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Recognised as Colour

#37374C

  • #37374C
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37374C is a blue with RGB values 55, 55, 76 and HSL 240°, 16%, 26%. It is a dark colour, so white text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37374C#37374C
HEX#37374C
RGBrgb(55, 55, 76)
RGB (0–1)0.2157, 0.2157, 0.298
RGB percentages21.6%, 21.6%, 29.8%
HSLhsl(240, 16%, 25.7%)
HSV / HSBhsv(240, 27.6%, 29.8%)
CMYK27.6%, 27.6%, 0%, 70.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,618,636
CSS custom property--colour: #37374C;

Brightness & contrast

Relative luminance0.04066WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.58:1
Contrast with white11.58:1WCAG normal text: AAA
Contrast with black1.81:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#C8C8B3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#31394Dno red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#31384Bno green cones; the most common form, about 1% of men; ΔE 3.1 from the original
Tritanopia#323B3Eno blue cones; rare, and affects men and women equally; ΔE 12.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.58:1WCAG large text: AAA
Contrast with black, large text1.81:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 20.8Dim grey · ΔE 24.8Black · ΔE 27.7Slate grey · ΔE 30Gray · ΔE 32.8Light slate grey · ΔE 33
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 20.81, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4C4C37
Analogous#37424C, #42374C
Triadic#4C3737, #374C37
Split complementary#4C4237, #424C37
Tetradic#4C3742, #4C4C37, #374C42

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9999B6
Lighter +30%#7C7CA0
Lighter +20%#626287
Lighter +10%#4C4C6A
Darker −10%#22222E
Darker −20%#0C0C11
Darker −30%#000000
Darker −40%#000000
More saturated +25%#27275C
Less saturated −25%#424242

Channel breakdown

R55
G55
B76
Red55 (21.6%)
Green55 (21.6%)
Blue76 (29.8%)
Hue240°
Saturation (HSL)16.03%
Lightness25.69%
Dominant channelBlue
Hex per channelR 37 · G 37 · B 4C

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Every value on this page was computed from “37374c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.