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Recognised as Colour

#37303B

  • #37303B
  • Violet
  • Dark
  • Nearest: Dark slate grey

#37303B is a violet with RGB values 55, 48, 59 and HSL 278°, 10%, 21%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37303B#37303B
HEX#37303B
RGBrgb(55, 48, 59)
RGB (0–1)0.2157, 0.1882, 0.2314
RGB percentages21.6%, 18.8%, 23.1%
HSLhsl(278.2, 10.3%, 21%)
HSV / HSBhsv(278.2, 18.6%, 23.1%)
CMYK6.8%, 18.6%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,616,827
CSS custom property--colour: #37303B;

Brightness & contrast

Relative luminance0.03242WCAG 2.x, 0 is black and 1 is white
Perceived brightness51.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.74:1
Contrast with white12.74:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#C8CFC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2F323Bno red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#30333Bno green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#373134no blue cones; rare, and affects men and women equally; ΔE 5.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.74:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 20.3Black · ΔE 22.5Dim grey · ΔE 24.8Slate grey · ΔE 33.1Gray · ΔE 33.6Light slate grey · ΔE 36.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 20.3, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#343B30
Analogous#32303B, #3B3039
Triadic#3B3730, #303B37
Split complementary#3A3B30, #303B32
Tetradic#3B3230, #343B30, #30393B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9E91A6
Lighter +30%#86758F
Lighter +20%#6B5E73
Lighter +10%#514757
Darker −10%#1D191F
Darker −20%#030203
Darker −30%#000000
Darker −40%#000000
More saturated +25%#3B2348
Less saturated −25%#363636

Channel breakdown

R55
G48
B59
Red55 (21.6%)
Green48 (18.8%)
Blue59 (23.1%)
Hue278.18°
Saturation (HSL)10.28%
Lightness20.98%
Dominant channelBlue
Hex per channelR 37 · G 30 · B 3B

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Every value on this page was computed from “37303b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.