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Recognised as Colour

#373D89

  • #373D89
  • Blue
  • Dark
  • Nearest: Dark slateblue

#373D89 is a blue with RGB values 55, 61, 137 and HSL 236°, 43%, 38%. It is a dark colour, so white text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#373D89#373D89
HEX#373D89
RGBrgb(55, 61, 137)
RGB (0–1)0.2157, 0.2392, 0.5373
RGB percentages21.6%, 23.9%, 53.7%
HSLhsl(235.6, 42.7%, 37.6%)
HSV / HSBhsv(235.6, 59.9%, 53.7%)
CMYK59.9%, 55.5%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,233
CSS custom property--colour: #373D89;

Brightness & contrast

Relative luminance0.05956WCAG 2.x, 0 is black and 1 is white
Perceived brightness72.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.58:1
Contrast with white9.58:1WCAG normal text: AAA
Contrast with black2.19:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#C8C276

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0C498Cno red cones; affects about 1% of men; ΔE 13.1 from the original
Deuteranopia#004287no green cones; the most common form, about 1% of men; ΔE 10.9 from the original
Tritanopia#004F5Dno blue cones; rare, and affects men and women equally; ΔE 47.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.58:1WCAG large text: AAA
Contrast with black, large text2.19:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 4.8Midnight blue · ΔE 17.9Rebecca purple · ΔE 21.9Slate blue · ΔE 25.9Royal blue · ΔE 29Medium purple · ΔE 30.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 4.85, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#898337
Analogous#376689, #5A3789
Triadic#89373D, #3D8937
Split complementary#895A37, #668937
Tetradic#893766, #898337, #37895A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AEB1DE
Lighter +30%#898ED0
Lighter +20%#656CC1
Lighter +10%#464DAD
Darker −10%#282D65
Darker −20%#1A1D40
Darker −30%#0B0C1C
Darker −40%#000000
More saturated +25%#1F29A1
Less saturated −25%#4F5171

Channel breakdown

R55
G61
B137
Red55 (21.6%)
Green61 (23.9%)
Blue137 (53.7%)
Hue235.61°
Saturation (HSL)42.71%
Lightness37.65%
Dominant channelBlue
Hex per channelR 37 · G 3D · B 89

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Every value on this page was computed from “373d89” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.