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Recognised as Colour

#37394B

  • #37394B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37394B is a blue with RGB values 55, 57, 75 and HSL 234°, 15%, 25%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37394B#37394B
HEX#37394B
RGBrgb(55, 57, 75)
RGB (0–1)0.2157, 0.2235, 0.2941
RGB percentages21.6%, 22.4%, 29.4%
HSLhsl(234, 15.4%, 25.5%)
HSV / HSBhsv(234, 26.7%, 29.4%)
CMYK26.7%, 24%, 0%, 70.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,619,147
CSS custom property--colour: #37394B;

Brightness & contrast

Relative luminance0.04246WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.36:1
Contrast with white11.36:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#C8C6B4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#343B4Cno red cones; affects about 1% of men; ΔE 2.2 from the original
Deuteranopia#33394Bno green cones; the most common form, about 1% of men; ΔE 1.6 from the original
Tritanopia#323C3Fno blue cones; rare, and affects men and women equally; ΔE 10.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.36:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.6Dim grey · ΔE 23.2Black · ΔE 27.2Slate grey · ΔE 29Gray · ΔE 31.5Light slate grey · ΔE 32
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4B4937
Analogous#37434B, #3F374B
Triadic#4B3739, #394B37
Split complementary#4B3F37, #434B37
Tetradic#4B3743, #4B4937, #374B3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#999CB5
Lighter +30%#7C809F
Lighter +20%#626686
Lighter +10%#4D4F68
Darker −10%#21232E
Darker −20%#0C0C10
Darker −30%#000000
Darker −40%#000000
More saturated +25%#272C5B
Less saturated −25%#414141

Channel breakdown

R55
G57
B75
Red55 (21.6%)
Green57 (22.4%)
Blue75 (29.4%)
Hue234°
Saturation (HSL)15.38%
Lightness25.49%
Dominant channelBlue
Hex per channelR 37 · G 39 · B 4B

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Every value on this page was computed from “37394b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.