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Recognised as Colour

#57738B

  • #57738B
  • Blue
  • Dark
  • Nearest: Slate grey

#57738B is a blue with RGB values 87, 115, 139 and HSL 208°, 23%, 44%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#57738B#57738B
HEX#57738B
RGBrgb(87, 115, 139)
RGB (0–1)0.3412, 0.451, 0.5451
RGB percentages34.1%, 45.1%, 54.5%
HSLhsl(207.7, 23%, 44.3%)
HSV / HSBhsv(207.7, 37.4%, 54.5%)
CMYK37.4%, 17.3%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,731,211
CSS custom property--colour: #57738B;

Brightness & contrast

Relative luminance0.16152WCAG 2.x, 0 is black and 1 is white
Perceived brightness110.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.96:1
Contrast with white4.96:1WCAG normal text: AA
Contrast with black4.23:1WCAG normal text: Fail
Greyscale equivalent#6F6F6F
Inverted#A88C74

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#69738Cno red cones; affects about 1% of men; ΔE 6.2 from the original
Deuteranopia#636D8Bno green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#45797Bno blue cones; rare, and affects men and women equally; ΔE 16.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.96:1WCAG large text: AAA
Contrast with black, large text4.23:1WCAG large text: AA

Named colours

Slate grey · ΔE 8.3Light slate grey · ΔE 10.3Steel blue · ΔE 16.7Dim grey · ΔE 17Gray · ΔE 18Dark slate grey · ΔE 21.8
Nearest named CSS colourSlate grey (#708090)ΔE 8.27, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B6F57
Analogous#578B89, #57598B
Triadic#8B5773, #738B57
Split complementary#8B5759, #8B8957
Tetradic#89578B, #8B6F57, #598B57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CED8E0
Lighter +30%#AEBFCD
Lighter +20%#8FA6B9
Lighter +10%#708DA5
Darker −10%#43596C
Darker −20%#303F4C
Darker −30%#1C252D
Darker −40%#080B0E
More saturated +25%#3B75A7
Less saturated −25%#717171

Channel breakdown

R87
G115
B139
Red87 (34.1%)
Green115 (45.1%)
Blue139 (54.5%)
Hue207.69°
Saturation (HSL)23.01%
Lightness44.31%
Dominant channelBlue
Hex per channelR 57 · G 73 · B 8B

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Every value on this page was computed from “57738b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.