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Colour

#37375B

  • #37375B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#37375B is a blue with RGB values 55, 55, 91 and HSL 240°, 25%, 29%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#37375B#37375B
HEX#37375B
RGBrgb(55, 55, 91)
RGB (0–1)0.2157, 0.2157, 0.3569
RGB percentages21.6%, 21.6%, 35.7%
HSLhsl(240, 24.7%, 28.6%)
HSV / HSBhsv(240, 39.6%, 35.7%)
CMYK39.6%, 39.6%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,618,651
CSS custom property--colour: #37375B;

Brightness & contrast

Relative luminance0.043WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.29:1
Contrast with white11.29:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#C8C8A4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B3C5Cno red cones; affects about 1% of men; ΔE 6.7 from the original
Deuteranopia#2A395Ano green cones; the most common form, about 1% of men; ΔE 5.6 from the original
Tritanopia#2D3E44no blue cones; rare, and affects men and women equally; ΔE 21.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.29:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 26.8Dark slate grey · ΔE 28.9Dim grey · ΔE 30.9Slate grey · ΔE 32.6Steel blue · ΔE 33Black · ΔE 34.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 26.76, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B5B37
Analogous#37495B, #49375B
Triadic#5B3737, #375B37
Split complementary#5B4937, #495B37
Tetradic#5B3749, #5B5B37, #375B49

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9B9BC3
Lighter +30%#7B7BB0
Lighter +20%#5D5D9B
Lighter +10%#4A4A7B
Darker −10%#24243B
Darker −20%#11111B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#25256D
Less saturated −25%#494949

Channel breakdown

R55
G55
B91
Red55 (21.6%)
Green55 (21.6%)
Blue91 (35.7%)
Hue240°
Saturation (HSL)24.66%
Lightness28.63%
Dominant channelBlue
Hex per channelR 37 · G 37 · B 5B

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Every value on this page was computed from “37375b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.