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Recognised as Colour

#373D56

  • #373D56
  • Blue
  • Dark
  • Nearest: Dark slate grey

#373D56 is a blue with RGB values 55, 61, 86 and HSL 228°, 22%, 28%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#373D56#373D56
HEX#373D56
RGBrgb(55, 61, 86)
RGB (0–1)0.2157, 0.2392, 0.3373
RGB percentages21.6%, 23.9%, 33.7%
HSLhsl(228.4, 22%, 27.6%)
HSV / HSBhsv(228.4, 36%, 33.7%)
CMYK36%, 29.1%, 0%, 66.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,182
CSS custom property--colour: #373D56;

Brightness & contrast

Relative luminance0.04822WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.69:1
Contrast with white10.69:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#C8C2A9

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#353F57no red cones; affects about 1% of men; ΔE 1.8 from the original
Deuteranopia#333D55no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#2E4246no blue cones; rare, and affects men and women equally; ΔE 15.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.69:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 20.8Dim grey · ΔE 24.5Slate grey · ΔE 27.9Light slate grey · ΔE 30.8Black · ΔE 30.9Gray · ΔE 31.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 20.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#565037
Analogous#374D56, #413756
Triadic#56373D, #3D5637
Split complementary#564137, #4D5637
Tetradic#56374D, #565037, #375641

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9AA1BF
Lighter +30%#7B84AB
Lighter +20%#5F6994
Lighter +10%#4B5375
Darker −10%#232737
Darker −20%#0F1118
Darker −30%#000000
Darker −40%#000000
More saturated +25%#253268
Less saturated −25%#474747

Channel breakdown

R55
G61
B86
Red55 (21.6%)
Green61 (23.9%)
Blue86 (33.7%)
Hue228.39°
Saturation (HSL)21.99%
Lightness27.65%
Dominant channelBlue
Hex per channelR 37 · G 3D · B 56

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Every value on this page was computed from “373d56” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.