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Recognised as Colour

#37374F

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

#37374F is a blue with RGB values 55, 55, 79 and HSL 240°, 18%, 26%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37374F#37374F
HEX#37374F
RGBrgb(55, 55, 79)
RGB (0–1)0.2157, 0.2157, 0.3098
RGB percentages21.6%, 21.6%, 31%
HSLhsl(240, 17.9%, 26.3%)
HSV / HSBhsv(240, 30.4%, 31%)
CMYK30.4%, 30.4%, 0%, 69%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,618,639
CSS custom property--colour: #37374F;

Brightness & contrast

Relative luminance0.04109WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.53:1
Contrast with white11.53:1WCAG normal text: AAA
Contrast with black1.82:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#C8C8B0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#303A50no red cones; affects about 1% of men; ΔE 4.1 from the original
Deuteranopia#30384Eno green cones; the most common form, about 1% of men; ΔE 3.4 from the original
Tritanopia#313B3Fno blue cones; rare, and affects men and women equally; ΔE 14.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.53:1WCAG large text: AAA
Contrast with black, large text1.82:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 22.3Dim grey · ΔE 25.9Black · ΔE 28.8Slate grey · ΔE 30.3Light slate grey · ΔE 33.2Gray · ΔE 33.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 22.3, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4F4F37
Analogous#37434F, #43374F
Triadic#4F3737, #374F37
Split complementary#4F4337, #434F37
Tetradic#4F3743, #4F4F37, #374F43

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9A9AB8
Lighter +30%#7C7CA3
Lighter +20%#61618B
Lighter +10%#4C4C6D
Darker −10%#222231
Darker −20%#0D0D13
Darker −30%#000000
Darker −40%#000000
More saturated +25%#262660
Less saturated −25%#434343

Channel breakdown

R55
G55
B79
Red55 (21.6%)
Green55 (21.6%)
Blue79 (31%)
Hue240°
Saturation (HSL)17.91%
Lightness26.27%
Dominant channelBlue
Hex per channelR 37 · G 37 · B 4F

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