Encycolorpedia

‎#42506e أكواد الألوان الست عشرية

#42506e Paint Chipالكود اللوني الست عشري‎#42506e هو ظل متوسط​الإظلام للأزرق.‏ في نموذج RGB للألوان يتكون ‎#42506e من‎25.88% أحمر، و‎31.37% أخضر، و‎43.14% أزرق. وفي الفضاء اللوني HSL يتكون ‎#42506e من صبغة لون221 درجة، و ‎25% تشبع، و ‎35% إضاءة. وهذا اللون له طول موجي يبلغ تقريباً 474.6 نانومتر.

الاختلافات اللون

ألوان مسماة

الألوان

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

‎#42506e انحدار خطي إلى التكميلي ‎#6f6841

  1. ‎#42506e
  2. ‎#4c5467
  3. ‎#555860
  4. ‎#5c5c58
  5. ‎#636051
  6. ‎#696449
  7. ‎#6f6841

ألوان أحادية

  1. ‎#34425f
  2. ‎#394764
  3. ‎#3d4b69
  4. ‎#42506e
  5. ‎#475573
  6. ‎#4c5978
  7. ‎#505e7d

الصبغات والظلال

‎#42506e إلى الأبيض

  1. ‎#42506e
  2. ‎#606a85
  3. ‎#7e869c
  4. ‎#9da3b4
  5. ‎#bdc1cc
  6. ‎#dedfe5
  7. ‎#ffffff / #fff

‎#42506e إلى الأسو

  1. ‎#42506e
  2. ‎#38435b
  3. ‎#2e3649
  4. ‎#242a37
  5. ‎#1b1e27
  6. ‎#111217
  7. ‎#000000 / #000

الدهانات

دهانات مماثلة

  1. Behr

    1. ★ Signature Blue UL240-22
      ‎#435171
      ΔE = 0.862 / LRV ≈ 8.3%
    2. Bossa Nova S540-7
      ‎#51556e
      ΔE = 3.890 / LRV ≈ 9.4%
  2. Asian Paints

    1. ★ Colonial Blue / X144
      ‎#404f70
      ΔE = 1.111 / LRV ≈ 7.9%
    2. ★ Nautical Code / 9173
      ‎#485169
      ΔE = 2.226 / LRV ≈ 8.3%
  3. Magnolia Home

    1. ★ Silos District / JG-92
      ‎#42526e
      ΔE = 1.231 / LRV ≈ 8.3%
  4. Glidden

    1. ★ Rich Navy / 50BB 08/171
      ‎#404d6b
      ΔE = 1.235 / LRV ≈ 7.5%
    2. Royal Navy / 50BB 10/112
      ‎#52586d
      ΔE = 4.945 / LRV ≈ 9.9%
  5. Olympic

    1. ★ Royal Hyacinth C45-6
      ‎#434e69
      ΔE = 1.322 / LRV ≈ 7.7%
    2. Annapolis Blue D48-6
      ‎#334c65
      ΔE = 4.577 / LRV ≈ 6.8%
  6. Resene

    1. ★ Quayside M52-054-262
      ‎#424f71
      ΔE = 1.569 / LRV ≈ 7.9%
    2. Takaka B46-058-268
      ‎#3d4d78
      ΔE = 4.686 / LRV ≈ 7.7%
  7. Caparol

    1. ★ 52 4 245 / Blaeulich-Grau
      ‎#48506c
      ΔE = 1.569 / LRV ≈ 8.2%
    2. 55 4 220 / Arctis 10
      ‎#4c5c78
      ΔE = 4.949 / LRV ≈ 10.5%
  8. Pascol

    1. ★ King Tides PZ5010
      ‎#424d68
      ΔE = 1.595 / LRV ≈ 7.5%
  9. KILZ

    1. ★ Blue Uniform / B912
      ‎#3b4e6e
      ΔE = 1.607 / LRV ≈ 7.5%
    2. Deep Velvet / B711
      ‎#4f5873
      ΔE = 3.892 / LRV ≈ 9.9%
  10. Clark+Kensington

    1. ★ Wild Blueberry / 38B-7
      ‎#445472
      ΔE = 1.638 / LRV ≈ 8.8%
    2. Good Night / 40B-7
      ‎#4b4d68
      ΔE = 3.209 / LRV ≈ 7.8%
  11. Nerolac

    1. ★ Blue Planet - 4239
      ‎#3d4e70
      ΔE = 1.670 / LRV ≈ 7.6%
    2. Thunder Bay - 2420
      ‎#314a65
      ΔE = 4.602 / LRV ≈ 6.5%
  12. Colortrend

    1. ★ Black&blue
      ‎#454d6a
      ΔE = 1.753 / LRV ≈ 7.6%
    2. 0592
      ‎#49536b
      ΔE = 2.492 / LRV ≈ 8.7%
  13. Bristol

    1. ★ Thai Silk / P102-C7
      ‎#3b506e
      ΔE = 1.760 / LRV ≈ 7.8%
    2. Royal Hyacinth / P101-C7
      ‎#4c506a
      ΔE = 2.761 / LRV ≈ 8.3%
  14. Opaltone / OMS

    1. ★ 6467
      ‎#424c6a
      ΔE = 1.771 / LRV ≈ 7.4%
    2. 6221
      ‎#4f5a72
      ΔE = 4.706 / LRV ≈ 10.2%
  15. Devoe Paint

    1. ★ Encore / 70BB 09/241
      ‎#465475
      ΔE = 2.060 / LRV ≈ 8.9%
    2. Inspired Violet / 90BB 09/186
      ‎#52536d
      ΔE = 4.091 / LRV ≈ 9.1%
  16. Sikkens

    1. ★ U0.20.30
      ‎#3e5370
      ΔE = 2.069 / LRV ≈ 8.4%
    2. V2.23.24
      ‎#4e5472
      ΔE = 3.086 / LRV ≈ 9.2%
  17. Ford

    1. ★ Silvertone Blue
      ‎#3d5175
      ΔE = 2.149 / LRV ≈ 8.2%
    2. Medium Opal
      ‎#4b5365
      ΔE = 4.319 / LRV ≈ 8.6%
  18. Brillux

    1. ★ 57.12.27
      ‎#3b5074
      ΔE = 2.232 / LRV ≈ 7.9%
    2. 60.15.27
      ‎#2b537c
      ΔE = 5.197 / LRV ≈ 8.2%
  19. Valspar Paint

    1. Majestic Peak R170A
      ‎#435571
      ΔE = 2.319 / LRV ≈ 8.9%
    2. Billions and Billions R182A
      ‎#4d5368
      ΔE = 3.660 / LRV ≈ 8.8%
  20. Pratt & Lambert

    1. Black Violet 28-15
      ‎#374f70
      ΔE = 2.369 / LRV ≈ 7.6%
    2. Parma Violet 28-16
      ‎#3b4970
      ΔE = 4.282 / LRV ≈ 6.9%
  21. Dutch Boy

    1. Moonlit Sky
      ‎#384c6b
      ΔE = 2.445 / LRV ≈ 7.1%
    2. Medieval Blue
      ‎#4d5575
      ΔE = 3.188 / LRV ≈ 9.4%
  22. Diamond Vogel

    1. Quiet Peace / 0592
      ‎#49536b
      ΔE = 2.492 / LRV ≈ 8.7%
    2. Midnight Iris / H055
      ‎#484d61
      ΔE = 3.802 / LRV ≈ 7.5%
  23. Audi

    1. Sapphire Blue / L50D
      ‎#374c6d
      ΔE = 2.604 / LRV ≈ 7.1%
    2. Caribicblau Pearl/Caribic Blue Pearl / K8, K8K8, LZ5G
      ‎#345679
      ΔE = 4.329 / LRV ≈ 8.8%
  24. CIL

    1. Rich Navy
      ‎#405169
      ΔE = 2.619 / LRV ≈ 8.0%
    2. King's Treasure
      ‎#424967
      ΔE = 3.112 / LRV ≈ 6.9%
  25. Cloverdale Paint

    1. Royal Wave / AC143
      ‎#465167
      ΔE = 2.772 / LRV ≈ 8.2%
    2. Night On The Town / 7293
      ‎#435265
      ΔE = 4.236 / LRV ≈ 8.2%
  26. Earthborn

    1. Trumpet
      ‎#484e65
      ΔE = 2.816 / LRV ≈ 7.8%
  27. Kelly-Moore

    1. Luxe / KM3120-5
      ‎#3c4c65
      ΔE = 2.863 / LRV ≈ 7.1%
    2. Prairie Night / KM3144-5
      ‎#355373
      ΔE = 3.456 / LRV ≈ 8.2%
  28. Benjamin Moore

    1. Stunning / 826
      ‎#424b63
      ΔE = 2.891 / LRV ≈ 7.1%
    2. Indi Go-Go / CSP-565
      ‎#455873
      ΔE = 3.567 / LRV ≈ 9.5%
  29. Crown Diamond

    1. 7351-73 Majestic Purple
      ‎#4b4e6b
      ΔE = 2.897 / LRV ≈ 8.0%
    2. 7358-73 Crescendo
      ‎#4f4b63
      ΔE = 5.186 / LRV ≈ 7.6%
  30. PPG Pittsburgh Paints

    1. Royal Hyacinth / PPG1169-7
      ‎#464b6a
      ΔE = 2.914 / LRV ≈ 7.4%
    2. Chinaberry / PPG1171-7
      ‎#464960
      ΔE = 4.108 / LRV ≈ 6.9%
  31. Wattyl

    1. Paris Skies / D84W
      ‎#49556d
      ΔE = 2.930 / LRV ≈ 9.0%
    2. Syrah / D73W
      ‎#4d4b65
      ΔE = 4.490 / LRV ≈ 7.5%
  32. New Look

    1. Spinning Around / G38-05
      ‎#49556d
      ΔE = 2.930 / LRV ≈ 9.0%
    2. Dancing in the Dark / G38-10
      ‎#4d4b65
      ΔE = 4.490 / LRV ≈ 7.5%
  33. Earthpaint

    1. 3-38-6 Charisma
      ‎#405379
      ΔE = 2.949 / LRV ≈ 8.7%
    2. 3-37-6 Wedgewinkle
      ‎#38557f
      ΔE = 4.650 / LRV ≈ 8.9%
  34. Graham & Brown

    1. Police Box Blue
      ‎#374f6b
      ΔE = 2.994 / LRV ≈ 7.5%
  35. Nippon Paint

    1. Blue Purple / NP PB 1491 A
      ‎#485074
      ΔE = 3.025 / LRV ≈ 8.4%
    2. Benedict Blue / NP PB 1512 A
      ‎#3c4a6d
      ΔE = 3.040 / LRV ≈ 7.0%
  36. Levis

    1. Shady Purple A70
      ‎#3b4966
      ΔE = 3.027 / LRV ≈ 6.7%
    2. Atl Denim B2
      ‎#3a5267
      ΔE = 5.044 / LRV ≈ 7.9%
  37. Federal Standard

    1. Federal Standard 25051
      ‎#464e63
      ΔE = 3.197 / LRV ≈ 7.7%
    2. Federal Standard 25053
      ‎#344a65
      ΔE = 4.049 / LRV ≈ 6.6%
  38. Model Master

    1. Model Master 1719
      ‎#3b4f67
      ΔE = 3.309 / LRV ≈ 7.5%
  39. Craig & Rose

    1. Don Adriano
      ‎#47567a
      ΔE = 3.327 / LRV ≈ 9.4%
  40. Natural Color System / NCS

    1. S 5020-R80B
      ‎#4c5771
      ΔE = 3.347 / LRV ≈ 9.5%
    2. S 5030-R80B
      ‎#38476d
      ΔE = 4.679 / LRV ≈ 6.5%
  41. Coronado Paint

    1. AC144 - Midnight Interlude
      ‎#354d69
      ΔE = 3.378 / LRV ≈ 7.1%
    2. AC145 - Inky Sea
      ‎#2e506e
      ΔE = 4.584 / LRV ≈ 7.4%
  42. Kansai Paint

    1. Wira Blue
      ‎#365278
      ΔE = 3.392 / LRV ≈ 8.2%
  43. RAL

    1. RAL 5000 / Violet blue
      ‎#354d73
      ΔE = 3.405 / LRV ≈ 7.3%
  44. Taubmans

    1. Admiral Blue / T10 40I-2
      ‎#364e69
      ΔE = 3.409 / LRV ≈ 7.3%
    2. Virginia Blue / T10 43I-2
      ‎#305174
      ΔE = 3.838 / LRV ≈ 7.8%
  45. British Standard

    1. BS 4800 20 C 39 - Blue
      ‎#3a4c64
      ΔE = 3.497 / LRV ≈ 7.0%
    2. BS381 104 - Azure blue
      ‎#355679
      ΔE = 4.190 / LRV ≈ 8.8%
  46. 1829

    1. Smalt
      ‎#46567b
      ΔE = 3.500 / LRV ≈ 9.4%
  47. Sherwin-Williams

    1. Dignified - 6538
      ‎#3b496d
      ΔE = 3.582 / LRV ≈ 6.8%
    2. Indigo Batik - 7602
      ‎#3e5063
      ΔE = 4.708 / LRV ≈ 7.7%
  48. Toyo Ink

    1. CF10949
      ‎#404869
      ΔE = 3.637 / LRV ≈ 6.7%
    2. CF10935
      ‎#2d4a69
      ΔE = 4.660 / LRV ≈ 6.5%
  49. Old Citadel

    1. Shadow Grey
      ‎#4e5067
      ΔE = 3.650 / LRV ≈ 8.3%
    2. Hormagaunt Purple
      ‎#4f566c
      ΔE = 4.038 / LRV ≈ 9.4%
  50. Vallejo Game Color

    1. Sombre Grey (048)
      ‎#4e5067
      ΔE = 3.650 / LRV ≈ 8.3%
    2. Heavy Violet (142)
      ‎#4f566c
      ΔE = 4.038 / LRV ≈ 9.4%
  51. Vallejo Model Color

    1. Oxford Blue (807)
      ‎#4e5067
      ΔE = 3.650 / LRV ≈ 8.3%
    2. Violet (960)
      ‎#4f566c
      ΔE = 4.038 / LRV ≈ 9.4%
  52. Reaper Master

    1. Twilight Blue (9020)
      ‎#4e5067
      ΔE = 3.650 / LRV ≈ 8.3%
    2. Nightshade Purple (9022)
      ‎#4f566c
      ΔE = 4.038 / LRV ≈ 9.4%
  53. Beckers

    1. Petroleum 790 / S 6511-B10G
      ‎#4f5268
      ΔE = 3.823 / LRV ≈ 8.7%
  54. Sigma

    1. Cool Blue / S 6030-R80B
      ‎#314a6b
      ΔE = 3.878 / LRV ≈ 6.6%
    2. Cool Blue / S 5040-R80B
      ‎#2f557e
      ΔE = 5.134 / LRV ≈ 8.6%
  55. Peintures MF

    1. Bleu impérial
      ‎#39486c
      ΔE = 3.948 / LRV ≈ 6.6%
    2. Sombre secret
      ‎#264c70
      ΔE = 5.247 / LRV ≈ 6.8%
  56. Ralph Lauren

    1. Carson Blue / RLTH230
      ‎#40495f
      ΔE = 3.972 / LRV ≈ 6.7%
  57. Rodda Paint

    1. China Aster H55
      ‎#494e61
      ΔE = 4.006 / LRV ≈ 7.7%
  58. Pantone / PMS

    1. 2140 CP
      ‎#2f4e74
      ΔE = 4.028 / LRV ≈ 7.3%
    2. P 108-15 C
      ‎#274c71
      ΔE = 5.117 / LRV ≈ 6.8%
  59. Johnstone's Paint

    1. Oxford Blue
      ‎#314b68
      ΔE = 4.111 / LRV ≈ 6.7%
  60. Sto

    1. 35141
      ‎#384762
      ΔE = 4.160 / LRV ≈ 6.2%
    2. 35241
      ‎#304b66
      ΔE = 4.705 / LRV ≈ 6.6%
  61. Mylands of London

    1. Prussian Blue
      ‎#3d5875
      ΔE = 4.176 / LRV ≈ 9.3%
  62. General Paint

    1. Espionage / CL 2337N
      ‎#405976
      ΔE = 4.203 / LRV ≈ 9.5%
    2. Storm Chaser / CL 2317N
      ‎#375980
      ΔE = 5.196 / LRV ≈ 9.5%
  63. Volkswagen

    1. Reef Blue
      ‎#305279
      ΔE = 4.248 / LRV ≈ 8.0%
    2. Titan Gray
      ‎#52576c
      ΔE = 4.788 / LRV ≈ 9.7%
  64. Nature Paint

    1. Beast
      ‎#43597e
      ΔE = 4.296 / LRV ≈ 9.8%
  65. AMC

    1. Cortez Medium Aqua
      ‎#2e4c6b
      ΔE = 4.300 / LRV ≈ 6.8%
    2. Academy Blue
      ‎#284f72
      ΔE = 4.958 / LRV ≈ 7.3%
  66. Vallejo

    1. Vallejo 70.962 #56
      ‎#3b4d77
      ΔE = 4.307 / LRV ≈ 7.6%
    2. Vallejo 70.963 #57
      ‎#32486c
      ΔE = 4.376 / LRV ≈ 6.4%
  67. Evonik-Degussa

    1. 202A Blue Thunder
      ‎#2c4e72
      ΔE = 4.308 / LRV ≈ 7.2%
    2. 201A Seclusion Blue
      ‎#294e6d
      ΔE = 5.189 / LRV ≈ 7.0%
  68. GM / General Motors

    1. Gulfmist Blue
      ‎#2f4b69
      ΔE = 4.327 / LRV ≈ 6.7%
    2. Harbor Blue
      ‎#2d4d69
      ΔE = 5.013 / LRV ≈ 6.9%
  69. Dulux

    1. Sapphire Springs 1
      ‎#324965
      ΔE = 4.372 / LRV ≈ 6.4%
    2. 30BB 08/225
      ‎#2f5472
      ΔE = 5.100 / LRV ≈ 8.2%
  70. Tollens

    1. T2008-4
      ‎#42587f
      ΔE = 4.385 / LRV ≈ 9.7%
    2. Nuit polaire | EE104
      ‎#3f475d
      ΔE = 4.608 / LRV ≈ 6.4%
  71. Dunn-Edwards

    1. Blue Earth / 89
      ‎#375673
      ΔE = 4.410 / LRV ≈ 8.7%
    2. Slumber / 67
      ‎#2d517c
      ΔE = 5.155 / LRV ≈ 7.9%
  72. California Paints

    1. DE 5853 - Space Shot
      ‎#375673
      ΔE = 4.410 / LRV ≈ 8.7%
    2. DE 5860 - Slumber
      ‎#2d517c
      ΔE = 5.155 / LRV ≈ 7.9%
  73. Crown Paint

    1. 1987 Denim
      ‎#3b507b
      ΔE = 4.417 / LRV ≈ 8.1%
    2. Dramatic
      ‎#39466d
      ΔE = 5.221 / LRV ≈ 6.4%
  74. ICI Paints

    1. Rich Navy 50BB 08/171
      ‎#364861
      ΔE = 4.500 / LRV ≈ 6.3%
    2. Mediterranean Blue 30BB 08/188
      ‎#324c64
      ΔE = 5.072 / LRV ≈ 6.8%
  75. Tamiya

    1. Tamiya 86504, AS4
      ‎#415366
      ΔE = 4.722 / LRV ≈ 8.3%
  76. Plascon

    1. Storm B4-E1-4
      ‎#3c5880
      ΔE = 4.730 / LRV ≈ 9.5%
  77. Porter Paints

    1. Celestial Blue / 451-7
      ‎#2c4c6a
      ΔE = 4.818 / LRV ≈ 6.7%
    2. Blue Tang / 449-7
      ‎#2a4a6f
      ΔE = 4.949 / LRV ≈ 6.5%
  78. Tikkurila

    1. 9728
      ‎#485465
      ΔE = 4.854 / LRV ≈ 8.7%
  79. Dulux Australia

    1. Misty Blue / A376
      ‎#34507c
      ΔE = 4.912 / LRV ≈ 7.9%
    2. Overtake / A364
      ‎#33587f
      ΔE = 5.246 / LRV ≈ 9.2%
  80. Chrysler

    1. Regatta Blue
      ‎#314963
      ΔE = 4.944 / LRV ≈ 6.3%
    2. Marine Blue
      ‎#2b517a
      ΔE = 4.986 / LRV ≈ 7.8%
  81. Albany Paint

    1. Little Boy
      ‎#4a5880
      ΔE = 5.044 / LRV ≈ 10.0%
  82. Jotun

    1. 0255 / Signalblå
      ‎#2e526f
      ΔE = 5.077 / LRV ≈ 7.8%
  83. Scib Paints

    1. Midnight Interlude / AC144
      ‎#30466b
      ΔE = 5.226 / LRV ≈ 6.1%
    2. Inky Sea / AC145
      ‎#274b71
      ΔE = 5.248 / LRV ≈ 6.7%
  84. Berger

    1. Midnight Interlude / AC144
      ‎#30466b
      ΔE = 5.226 / LRV ≈ 6.1%
    2. Inky Sea / AC145
      ‎#274b71
      ΔE = 5.248 / LRV ≈ 6.7%
  85. Vista Paint

    1. Midnight Interlude
      ‎#30466b
      ΔE = 5.226 / LRV ≈ 6.1%
    2. Inky Sea
      ‎#274b71
      ΔE = 5.248 / LRV ≈ 6.7%

محاكاة عمى اللون

Monochromacy

Dichromacy

رؤية ثلاثية الألوان

‎#42506e HTML / CSS أمثلة على الرمز

‎#42506e الصدارة

أراق ماء وجهه.

<p style="color: #42506e">…</p>

‎#42506e الخلفية

خذ الحكمة من أفواه المجانين.

<p style="background-color: #42506e">…</p>

‎#42506e ظل النص

شق عصا الطاعة.

<p style="text-shadow: 0.1em 0.1em 0.15em #42506e">…</p>

الرسوم البيانية للون

تحويلات مساحة اللون

عشري
4345966
الثنائية
01000010, 01010000, 01101110
عشري
#42506e
LRV
≈ 8.0%
أقرب لون ست عشري قصير
#457 ΔE = 2.398
RGB
rgb(66, 80, 110)
RGBA
rgba(66, 80, 110, 1.0)
rg اللونية
r: 0.258, g: 0.312, b: 0.430
RYB
أحمر: 25.882%, أصفر: 30.047%, أزرق: 43.137%
Android / android.graphics.Color
-12431250 / 0xff42506e
HSL
hsl(221, 25%, 35%)
HSLA
hsla(221, 25%, 35%, 1.0)
HSV / HSB
صبغة: 221° (220.909), تشبع: 40% (0.400), قيمة: 43% (0.431)
HSP
صبغة: 220.909, تشبع: 40.000%, السطوع المدركة: 31.467%
HSLuv (HUSL)
H: 253.170, S: 40.482, L: 34.027
Cubehelix
H: -141.097, S: 0.308, L: 0.310
TSL
T: -2.140, S: 0.105, L: 0.311
CMYK
سيان: 40% (0.400), ماجنتي: 27% (0.273), أصفر: 0% (0.000), أسود: 57% (0.569)
CMY
سيان: 74% (0.741), ماجنتي: 69% (0.686), أصفر: 57% (0.569)
XYZ
X: 7.929, Y: 8.021, Z: 15.879
xyY
x: 0.249, y: 0.252, Y: 8.021
CIELab
L: 34.027, a: 2.841, b: -19.021
CIELuv
L: 34.027, u: -7.747, v: -25.610
CIELCH / LCHab
L: 34.027, C: 19.232, H: 278.495
CIELUV / LCHuv
L: 34.027, C: 26.756, H: 253.170
Hunter-Lab
L: 28.321, a: 0.412, b: -13.418
CIECAM02
J: 24.753, C: 25.642, h: 258.206, Q: 98.023, M: 22.424, s: 47.829, H: 310.156
OSA-UCS
خفة: -10.238, أصفر: -3.324, أخضر: 0.628
LMS
L: 6.677, M: 8.134, S: 15.749
YCbCr
Y: 84.062, Cb: 143.242, Cr: 119.724
YCgCo
Y: 84.000, Cg: -4.000, Co: 5.500
YDbDr
Y: 79.234, Db: 46.290, Dr: 25.172
YPbPr
Y: 79.178, Pb: 16.610, Pr: -8.380
xvYCC
Y: 84.000, Cb: 142.591, Cr: 120.639
YIQ
Y: 79.234, I: -17.978, Q: 6.374
YUV
Y: 79.234, U: 15.141, V: -11.610
نظام الألوان مونسل
7.5PB 3/4 ΔE = 2.690
لون العلامة التجارية
Tumblr ΔE = 3.845

ألوان عشوائية

أحمر

أخضر

أزرق