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Recognised as Colour

#373D80

  • #373D80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#373D80 is a blue with RGB values 55, 61, 128 and HSL 235°, 40%, 36%. It is a dark colour, so white text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#373D80#373D80
HEX#373D80
RGBrgb(55, 61, 128)
RGB (0–1)0.2157, 0.2392, 0.502
RGB percentages21.6%, 23.9%, 50.2%
HSLhsl(235.1, 39.9%, 35.9%)
HSV / HSBhsv(235.1, 57%, 50.2%)
CMYK57%, 52.3%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,224
CSS custom property--colour: #373D80;

Brightness & contrast

Relative luminance0.05708WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.81:1
Contrast with white9.81:1WCAG normal text: AAA
Contrast with black2.14:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#C8C27F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1B4782no red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#10417Fno green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#114C58no blue cones; rare, and affects men and women equally; ΔE 41.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.81:1WCAG large text: AAA
Contrast with black, large text2.14:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8.6Midnight blue · ΔE 21.3Rebecca purple · ΔE 26.2Slate blue · ΔE 30.8Steel blue · ΔE 33.4Royal blue · ΔE 33.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 8.55, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#807A37
Analogous#376180, #563780
Triadic#80373D, #3D8037
Split complementary#805637, #618037
Tetradic#803761, #807A37, #378056

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A9ADDA
Lighter +30%#858BCB
Lighter +20%#6269BB
Lighter +10%#464EA4
Darker −10%#282C5C
Darker −20%#181B39
Darker −30%#090A15
Darker −40%#000000
More saturated +25%#202A97
Less saturated −25%#4E5069

Channel breakdown

R55
G61
B128
Red55 (21.6%)
Green61 (23.9%)
Blue128 (50.2%)
Hue235.07°
Saturation (HSL)39.89%
Lightness35.88%
Dominant channelBlue
Hex per channelR 37 · G 3D · B 80

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Every value on this page was computed from “373d80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.