Encycolorpedia

‎#556b75 أكواد الألوان الست عشرية

#556b75 Paint Chipالكود اللوني الست عشري‎#556b75 هو ظل متوسط​الإظلام للسيان.‏ في نموذج RGB للألوان يتكون ‎#556b75 من‎33.33% أحمر، و‎41.96% أخضر، و‎45.88% أزرق. وفي الفضاء اللوني HSL يتكون ‎#556b75 من صبغة لون199 درجة، و ‎16% تشبع، و ‎40% إضاءة. وهذا اللون له طول موجي يبلغ تقريباً 484.48 نانومتر.

الاختلافات اللون

ألوان مسماة

الألوان

تحميل: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

‎#556b75 انحدار خطي إلى التكميلي ‎#736157

  1. ‎#556b75
  2. ‎#5b6970
  3. ‎#61686b
  4. ‎#666666 / #666
  5. ‎#6b6461
  6. ‎#6f635c
  7. ‎#736157

ألوان أحادية

  1. ‎#435862
  2. ‎#495e68
  3. ‎#4f656f
  4. ‎#556b75
  5. ‎#5b717b
  6. ‎#627882
  7. ‎#687e89

الصبغات والظلال

‎#556b75 إلى الأبيض

  1. ‎#556b75
  2. ‎#70828b
  3. ‎#8b9aa1
  4. ‎#a7b2b8
  5. ‎#c4cbcf
  6. ‎#e1e5e7
  7. ‎#ffffff / #fff

‎#556b75 إلى الأسو

  1. ‎#556b75
  2. ‎#475961
  3. ‎#3a474d
  4. ‎#2c363a
  5. ‎#202629
  6. ‎#141718
  7. ‎#000000 / #000

الدهانات

دهانات مماثلة

  1. Wattyl

    1. ★ Colorbond Blue Ridge ® / E51W
      ‎#566b75
      ΔE = 0.276 / LRV ≈ 13.8%
  2. New Look

    1. ★ Autumn Storm / A08-09
      ‎#566b75
      ΔE = 0.276 / LRV ≈ 13.8%
    2. Blue Topaz / B16-04
      ‎#426f7e
      ΔE = 5.135 / LRV ≈ 14.0%
  3. Sico

    1. ★ 6169-63 Flemish Painter
      ‎#566a72
      ΔE = 1.033 / LRV ≈ 13.5%
    2. 6210-63 Happy Piccolo
      ‎#5f6568
      ΔE = 5.050 / LRV ≈ 12.7%
  4. GM / General Motors

    1. ★ Chelsea Blue
      ‎#586c74
      ΔE = 1.099 / LRV ≈ 14.1%
    2. Denmark Blue
      ‎#4f6570
      ΔE = 2.469 / LRV ≈ 12.1%
  5. ICI Paints

    1. ★ Connecticut Blue 90BG 17/090
      ‎#596b75
      ΔE = 1.126 / LRV ≈ 13.9%
    2. Country Blue 30BG 19/094
      ‎#5b7378
      ΔE = 4.034 / LRV ≈ 15.8%
  6. General Paint

    1. ★ Zydeco / CL 3096A
      ‎#5a6c75
      ΔE = 1.232 / LRV ≈ 14.2%
    2. Bay Of Many / CL 2276A
      ‎#4d6271
      ΔE = 4.339 / LRV ≈ 11.5%
  7. Earthpaint

    1. ★ 5-34-5 Weathered Blue
      ‎#526c79
      ΔE = 1.529 / LRV ≈ 13.9%
    2. 5-35-6 Breakwater Ridge
      ‎#506270
      ΔE = 4.178 / LRV ≈ 11.6%
  8. Duron

    1. ★ Riverway
      ‎#506b74
      ΔE = 1.573 / LRV ≈ 13.5%
    2. Grays Harbor
      ‎#626c78
      ΔE = 4.106 / LRV ≈ 14.7%
  9. Clark+Kensington

    1. ★ Hidden River / 34B-7
      ‎#4f6873
      ΔE = 1.599 / LRV ≈ 12.8%
    2. Smooth Shale / EXTCC-50
      ‎#636b71
      ΔE = 3.990 / LRV ≈ 14.4%
  10. Testors

    1. ★ Testors 1163
      ‎#566873
      ΔE = 1.622 / LRV ≈ 13.1%
  11. Olympic

    1. ★ Silent Night D55-5
      ‎#526870
      ΔE = 1.630 / LRV ≈ 12.9%
    2. Milky Way D54-5
      ‎#4d6f7d
      ΔE = 3.142 / LRV ≈ 14.4%
  12. California Paints

    1. ★ Portsmouth Blue
      ‎#586d74
      ΔE = 1.669 / LRV ≈ 14.3%
    2. DE 6334 - Long Lake
      ‎#68757e
      ΔE = 5.238 / LRV ≈ 17.2%
  13. Porter Paints

    1. ★ Silent Night / 552-6
      ‎#516772
      ΔE = 1.678 / LRV ≈ 12.7%
    2. Lava Gray / 554-6
      ‎#5e686d
      ΔE = 3.551 / LRV ≈ 13.4%
  14. Nippon Paint

    1. ★ Stone Fence / NP N 2003 D
      ‎#5a6c78
      ΔE = 1.855 / LRV ≈ 14.3%
    2. Puritan Black / NP N 1982 D
      ‎#61666c
      ΔE = 4.852 / LRV ≈ 13.1%
  15. Taubmans

    1. ★ Liberate / T10 45L-1
      ‎#4f6c79
      ΔE = 1.919 / LRV ≈ 13.8%
    2. ★ Coalminers Grey / T148-8
      ‎#5b6d79
      ΔE = 2.049 / LRV ≈ 14.5%
  16. Valspar Paint

    1. ★ Prussian Cadet
      ‎#59707a
      ΔE = 1.966 / LRV ≈ 15.1%
    2. Baritone Blues
      ‎#526a7c
      ΔE = 3.792 / LRV ≈ 13.6%
  17. Resene

    1. ★ Streetwise B51-024-217
      ‎#4f6971
      ΔE = 2.021 / LRV ≈ 13.0%
    2. Quarter Tuna B55-009-258
      ‎#656a70
      ΔE = 4.836 / LRV ≈ 14.2%
  18. Opaltone / OMS

    1. ★ 5443
      ‎#4e6b74
      ΔE = 2.066 / LRV ≈ 13.4%
    2. 5450
      ‎#4a696f
      ΔE = 3.810 / LRV ≈ 12.7%
  19. Dunn-Edwards

    1. ★ Before the Storm / 167
      ‎#4d6a77
      ΔE = 2.075 / LRV ≈ 13.2%
    2. Iron Creek / 183
      ‎#50676b
      ΔE = 3.707 / LRV ≈ 12.5%
  20. Crown Diamond

    1. ★ 7405-63 Night Smelt
      ‎#5a6b71
      ΔE = 2.077 / LRV ≈ 13.9%
    2. 7317-63 Tornado
      ‎#586c70
      ΔE = 3.005 / LRV ≈ 14.0%
  21. Coronado Paint

    1. ★ 7382 - Dusk Blue
      ‎#516e77
      ΔE = 2.130 / LRV ≈ 14.2%
    2. 8262 - Blue Lake
      ‎#546066
      ΔE = 4.825 / LRV ≈ 11.2%
  22. Evonik-Degussa

    1. ★ 373
      ‎#536f7c
      ΔE = 2.184 / LRV ≈ 14.7%
    2. 3233D Vulcan Blue
      ‎#4e7081
      ΔE = 4.002 / LRV ≈ 14.8%
  23. Flügger

    1. ★ Klassisk inde: Oregon Grape (No.53)
      ‎#586d7b
      ΔE = 2.298 / LRV ≈ 14.4%
  24. Sto

    1. 35342
      ‎#536672
      ΔE = 2.313 / LRV ≈ 12.6%
    2. 35330
      ‎#59707e
      ΔE = 2.796 / LRV ≈ 15.2%
  25. Glidden

    1. Superstition / PPG1035-6
      ‎#5b6e74
      ΔE = 2.349 / LRV ≈ 14.6%
    2. America's Cup Blue
      ‎#4b6171
      ΔE = 4.939 / LRV ≈ 11.2%
  26. Vista Paint

    1. Dusk Blue
      ‎#506f7b
      ΔE = 2.420 / LRV ≈ 14.5%
    2. Wrapped in Twilight
      ‎#5d6b6b
      ΔE = 5.127 / LRV ≈ 13.9%
  27. Berger

    1. Dusk Blue / 7382
      ‎#506f7b
      ΔE = 2.420 / LRV ≈ 14.5%
    2. Blue Lake / 8262
      ‎#57626b
      ΔE = 4.174 / LRV ≈ 11.8%
  28. Nerolac

    1. Gloomy Sky - 2979
      ‎#566671
      ΔE = 2.460 / LRV ≈ 12.7%
    2. Sinbad - 2965
      ‎#646e73
      ΔE = 4.032 / LRV ≈ 15.1%
  29. Tollens

    1. T2021-3
      ‎#586a6f
      ΔE = 2.472 / LRV ≈ 13.5%
    2. Paon | EE117
      ‎#496069
      ΔE = 4.639 / LRV ≈ 10.8%
  30. Australian Standard AS2700

    1. B53 Dark Grey Blue
      ‎#4f6571
      ΔE = 2.595 / LRV ≈ 12.2%
  31. Chrysler

    1. Pacific Blue
      ‎#5b717d
      ΔE = 2.662 / LRV ≈ 15.5%
    2. Charcoal
      ‎#5e6870
      ΔE = 3.270 / LRV ≈ 13.4%
  32. Asian Paints

    1. Sea Pebbles / 9470
      ‎#54656c
      ΔE = 2.746 / LRV ≈ 12.3%
    2. Ink Grey / 8270
      ‎#546571
      ΔE = 2.820 / LRV ≈ 12.4%
  33. Brillux

    1. 69.06.24
      ‎#53696e
      ΔE = 2.749 / LRV ≈ 13.1%
    2. 66.09.24
      ‎#49697a
      ΔE = 3.759 / LRV ≈ 12.9%
  34. Dulux

    1. Steel Symphony 1 / 90BG 17/090
      ‎#5e717b
      ΔE = 2.754 / LRV ≈ 15.6%
    2. 49BB 14/046
      ‎#60666c
      ΔE = 4.561 / LRV ≈ 13.1%
  35. Sigma

    1. Cool Blue / S 6010-R90B
      ‎#606f77
      ΔE = 2.787 / LRV ≈ 15.2%
    2. Cool Blue / 5340 B
      ‎#48646f
      ΔE = 3.534 / LRV ≈ 11.6%
  36. Bristol

    1. Blue Zephyr / P228-N6
      ‎#5b6873
      ΔE = 2.795 / LRV ≈ 13.4%
    2. Florentine Blue / P221-N6
      ‎#567279
      ΔE = 3.401 / LRV ≈ 15.4%
  37. Natural Color System / NCS

    1. S 5010-B10G
      ‎#5d6a6f
      ΔE = 2.950 / LRV ≈ 13.8%
    2. S 4020-B
      ‎#547385
      ΔE = 4.754 / LRV ≈ 15.8%
  38. Kelly-Moore

    1. Blue Lake / KM3799-3
      ‎#5e6971
      ΔE = 2.952 / LRV ≈ 13.7%
    2. Cortez / 73
      ‎#4c636f
      ΔE = 3.415 / LRV ≈ 11.6%
  39. Cloverdale Paint

    1. Blue Lake / 8262
      ‎#606d73
      ΔE = 2.993 / LRV ≈ 14.7%
    2. Smokey Hearth / 8254
      ‎#60666c
      ΔE = 4.561 / LRV ≈ 13.1%
  40. Pratt & Lambert

    1. Symphony Blue 27-20
      ‎#5c6e7c
      ΔE = 3.001 / LRV ≈ 14.9%
    2. Wythe House Gray CW721
      ‎#666f76
      ΔE = 4.335 / LRV ≈ 15.5%
  41. Humbrol

    1. 123 Extra Dark Sea Grey
      ‎#616e76
      ΔE = 3.001 / LRV ≈ 15.0%
    2. 79 Blue Grey
      ‎#616974
      ΔE = 4.280 / LRV ≈ 13.9%
  42. Model Master

    1. Model Master 2014
      ‎#5d686e
      ΔE = 3.146 / LRV ≈ 13.4%
    2. Model Master 1923
      ‎#53626a
      ΔE = 3.724 / LRV ≈ 11.6%
  43. Behr

    1. PMD-65
      ‎#526f7f
      ΔE = 3.186 / LRV ≈ 14.7%
    2. Starry Night EIC-49
      ‎#537483
      ΔE = 4.294 / LRV ≈ 16.0%
  44. Rodda Paint

    1. Winter Harbor H51
      ‎#5f727d
      ΔE = 3.244 / LRV ≈ 15.9%
    2. Portsmouth Blue H49
      ‎#5e7275
      ΔE = 4.456 / LRV ≈ 15.7%
  45. Audi

    1. Opal Pearl / LZ7M, Z2
      ‎#57646e
      ΔE = 3.357 / LRV ≈ 12.3%
    2. Minervagruen Pearl / LZ5N
      ‎#4a656a
      ΔE = 4.352 / LRV ≈ 11.8%
  46. Crown Paint

    1. Genuine
      ‎#4e6574
      ΔE = 3.392 / LRV ≈ 12.2%
    2. Rock A Billy Blue
      ‎#63747b
      ΔE = 4.248 / LRV ≈ 16.6%
  47. Tata

    1. Platinum Grey / 729
      ‎#51636a
      ΔE = 3.438 / LRV ≈ 11.7%
  48. Magnolia Home

    1. Storm Chaser / JG-86
      ‎#616f74
      ΔE = 3.474 / LRV ≈ 15.2%
  49. Diamond Vogel

    1. Hidden Harbor / H051
      ‎#60737d
      ΔE = 3.528 / LRV ≈ 16.2%
    2. Deep Lagoon / 0507
      ‎#68737c
      ΔE = 5.006 / LRV ≈ 16.7%
  50. Sikkens

    1. Q9.10.40
      ‎#5f7176
      ΔE = 3.550 / LRV ≈ 15.6%
    2. Q0.10.40
      ‎#5c7274
      ΔE = 4.885 / LRV ≈ 15.6%
  51. Devoe Paint

    1. Soaring Eagle / 10BB 15/154
      ‎#576e7f
      ΔE = 3.593 / LRV ≈ 14.7%
    2. Pebble Drift / 90BG 17/120
      ‎#617680
      ΔE = 4.497 / LRV ≈ 17.1%
  52. Tikkurila

    1. 596X
      ‎#516369
      ΔE = 3.677 / LRV ≈ 11.7%
    2. 605X
      ‎#526678
      ΔE = 4.461 / LRV ≈ 12.7%
  53. Volkswagen

    1. Jade
      ‎#567282
      ΔE = 3.831 / LRV ≈ 15.6%
    2. Turquoise
      ‎#456475
      ΔE = 4.746 / LRV ≈ 11.7%
  54. Peintures MF

    1. DD445-5
      ‎#526e80
      ΔE = 3.841 / LRV ≈ 14.5%
    2. DD454-5
      ‎#4d6e73
      ΔE = 4.287 / LRV ≈ 14.0%
  55. Zoffany

    1. Prussian
      ‎#4e6269
      ΔE = 3.899 / LRV ≈ 11.4%
  56. PPG Pittsburgh Paints

    1. Hamlin Blue Chs-61
      ‎#556b7d
      ΔE = 3.908 / LRV ≈ 13.9%
    2. Live On 4Th 7120-1
      ‎#64707c
      ΔE = 4.317 / LRV ≈ 15.8%
  57. Dulux Australia

    1. Moody Dream / D9
      ‎#50626f
      ΔE = 3.943 / LRV ≈ 11.6%
    2. Blue Tuscany / I63
      ‎#547285
      ΔE = 4.878 / LRV ≈ 15.6%
  58. Scib Paints

    1. Romantic Mood / 8263
      ‎#646f79
      ΔE = 3.964 / LRV ≈ 15.5%
    2. Blue Lake / 8262
      ‎#57626b
      ΔE = 4.174 / LRV ≈ 11.8%
  59. Levis

    1. Clear Grey A60
      ‎#64727a
      ΔE = 3.966 / LRV ≈ 16.1%
    2. Atl Soleil A7
      ‎#537686
      ΔE = 5.179 / LRV ≈ 16.5%
  60. Ford

    1. Medium Aegean
      ‎#647177
      ΔE = 3.992 / LRV ≈ 15.9%
    2. Medium Seafoam
      ‎#50747e
      ΔE = 4.392 / LRV ≈ 15.7%
  61. Pantone / PMS

    1. 431
      ‎#636b70
      ΔE = 4.093 / LRV ≈ 14.3%
    2. 7545
      ‎#54616e
      ΔE = 4.741 / LRV ≈ 11.6%
  62. Brighto Paints

    1. 7821 Admiral
      ‎#4c6e74
      ΔE = 4.101 / LRV ≈ 13.9%
    2. 5-36-5 Sea Smoke
      ‎#526576
      ΔE = 4.310 / LRV ≈ 12.4%
  63. Dutch Boy

    1. Evening Coast
      ‎#566b6d
      ΔE = 4.103 / LRV ≈ 13.6%
    2. New Hampshire Blue
      ‎#5a6a7c
      ΔE = 4.681 / LRV ≈ 13.9%
  64. Benjamin Moore

    1. Stained Glass / CSP-685
      ‎#45656e
      ΔE = 4.130 / LRV ≈ 11.7%
    2. Bella Blue / 720
      ‎#55757d
      ΔE = 4.451 / LRV ≈ 16.1%
  65. Laura Ashley

    1. 45-4 Chartwell Gray
      ‎#626971
      ΔE = 4.188 / LRV ≈ 13.9%
    2. 5-1 Deep Teal
      ‎#46616a
      ΔE = 4.702 / LRV ≈ 10.9%
  66. AMC

    1. Bali Blue
      ‎#60707f
      ΔE = 4.229 / LRV ≈ 15.6%
    2. Slate Blue
      ‎#647580
      ΔE = 4.685 / LRV ≈ 17.0%
  67. Dupont

    1. CAS926
      ‎#47626f
      ΔE = 4.250 / LRV ≈ 11.2%
    2. CAS910
      ‎#44646a
      ΔE = 5.174 / LRV ≈ 11.4%
  68. CIL

    1. Global Waters
      ‎#46636c
      ΔE = 4.254 / LRV ≈ 11.3%
    2. Great Grey
      ‎#626a6c
      ΔE = 4.778 / LRV ≈ 14.0%
  69. Ralph Lauren

    1. Renoir / RLVM276
      ‎#5d7680
      ΔE = 4.285 / LRV ≈ 16.8%
  70. Mylands of London

    1. Privet Green
      ‎#556769
      ΔE = 4.303 / LRV ≈ 12.7%
    2. Lead
      ‎#5e6673
      ΔE = 4.850 / LRV ≈ 13.1%
  71. Jotun

    1. 4638 / Byge
      ‎#667078
      ΔE = 4.321 / LRV ≈ 15.8%
    2. 0263 / Bondeblå
      ‎#5a7377
      ΔE = 4.425 / LRV ≈ 15.8%
  72. 1829

    1. Steel Blue
      ‎#557484
      ΔE = 4.426 / LRV ≈ 16.1%
  73. Sherwin-Williams

    1. Tempe Star - 6229
      ‎#47626a
      ΔE = 4.480 / LRV ≈ 11.1%
    2. Riverway - 6222
      ‎#5d7274
      ΔE = 4.869 / LRV ≈ 15.6%
  74. Fired Earth

    1. Tempest
      ‎#616a77
      ΔE = 4.499 / LRV ≈ 14.2%
  75. Colortrend

    1. Priory Wall
      ‎#4e6d81
      ΔE = 4.676 / LRV ≈ 14.1%
    2. 0514
      ‎#5f646c
      ΔE = 5.109 / LRV ≈ 12.6%
  76. Federal Standard

    1. Federal Standard 16152
      ‎#5c6369
      ΔE = 4.732 / LRV ≈ 12.2%
    2. Federal Standard 36118
      ‎#676c73
      ΔE = 5.045 / LRV ≈ 14.8%
  77. Caran d'Ache

    1. 808 French Gray
      ‎#68737b
      ΔE = 4.954 / LRV ≈ 16.6%
  78. British Standard

    1. BS 2660 BS 9-097 - Dk. Admiralty grey
      ‎#656d6f
      ΔE = 5.029 / LRV ≈ 14.9%
    2. BS381 638 - Dark sea grey
      ‎#676c70
      ΔE = 5.142 / LRV ≈ 14.8%
  79. Graham & Brown

    1. Bath House Blue
      ‎#4e7385
      ΔE = 5.050 / LRV ≈ 15.6%
  80. Volvo

    1. Baltic Sea Blue / 1619
      ‎#556065
      ΔE = 5.060 / LRV ≈ 11.2%
  81. KILZ

    1. Night Train / D712
      ‎#477281
      ΔE = 5.063 / LRV ≈ 15.0%
  82. Vallejo

    1. Vallejo 70.901 #63
      ‎#566577
      ΔE = 5.180 / LRV ≈ 12.6%
    2. Vallejo 70.808 #70
      ‎#457079
      ΔE = 5.199 / LRV ≈ 14.2%
  83. Caparol

    1. 9007 / Graualuminium
      ‎#646870
      ΔE = 5.185 / LRV ≈ 13.8%
    2. 2620
      ‎#5c7880
      ΔE = 5.190 / LRV ≈ 17.3%

‎#556b75 HTML / CSS أمثلة على الرمز

‎#556b75 الصدارة

ساعة القضا يعمى البصر

<p style="color: #556b75">…</p>

‎#556b75 الخلفية

لا تزم ولا تشكر الا بعد سنة وست اشهر

<p style="background-color: #556b75">…</p>

‎#556b75 ظل النص

أطول من يوم الفراق.

<p style="text-shadow: 0.1em 0.1em 0.15em #556b75">…</p>

الرسوم البيانية للون

تحويلات مساحة اللون

عشري
5598069
الثنائية
01010101, 01101011, 01110101
عشري
#556b75
LRV
≈ 13.7%
أقرب لون ست عشري قصير
#467 ΔE = 4.140
RGB
rgb(85, 107, 117)
RGBA
rgba(85, 107, 117, 1.0)
rg اللونية
r: 0.275, g: 0.346, b: 0.379
RYB
أحمر: 33.333%, أصفر: 38.446%, أزرق: 45.882%
Android / android.graphics.Color
-11179147 / 0xff556b75
HSL
hsl(199, 16%, 40%)
HSLA
hsla(199, 16%, 40%, 1.0)
HSV / HSB
صبغة: 199° (198.750), تشبع: 27% (0.274), قيمة: 46% (0.459)
HSP
صبغة: 198.750, تشبع: 27.350%, السطوع المدركة: 40.072%
HSLuv (HUSL)
H: 222.711, S: 36.451, L: 43.844
Cubehelix
H: -167.589, S: 0.191, L: 0.398
TSL
T: -1.874, S: 0.080, L: 0.398
CMYK
سيان: 27% (0.274), ماجنتي: 9% (0.085), أصفر: 0% (0.000), أسود: 54% (0.541)
CMY
سيان: 67% (0.667), ماجنتي: 58% (0.580), أصفر: 54% (0.541)
XYZ
X: 12.214, Y: 13.731, Z: 18.833
xyY
x: 0.273, y: 0.307, Y: 13.731
CIELab
L: 43.844, a: -5.634, b: -8.254
CIELuv
L: 43.844, u: -11.382, v: -10.507
CIELCH / LCHab
L: 43.844, C: 9.993, H: 235.686
CIELUV / LCHuv
L: 43.844, C: 15.490, H: 222.711
Hunter-Lab
L: 37.055, a: -6.009, b: -4.195
CIECAM02
J: 33.305, C: 17.181, h: 225.706, Q: 113.702, M: 15.025, s: 36.351, H: 286.182
OSA-UCS
خفة: -10.122, أصفر: -1.418, أخضر: 1.385
LMS
L: 11.791, M: 14.829, S: 18.744
YCbCr
Y: 103.239, Cb: 135.646, Cr: 117.632
YCoCg
Y: 104.000, Cg: 3.000, Co: 13.250
YDbDr
Y: 101.562, Db: 23.230, Dr: 31.496
YPbPr
Y: 103.034, Pb: 7.530, Pr: -11.460
xvYCC
Y: 104.488, Cb: 134.615, Cr: 117.933
YIQ
Y: 101.562, I: -16.318, Q: -1.541
YUV
Y: 101.562, U: 7.598, V: -14.530
نظام الألوان مونسل
7.5B 4/2 ΔE = 2.466
لون العلامة التجارية
Southwest Airlines Deep Silver ΔE = 8.840

ألوان عشوائية

أحمر

أخضر

أزرق