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Recognised as Colour

#373E8F

  • #373E8F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#373E8F is a blue with RGB values 55, 62, 143 and HSL 235°, 44%, 39%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#373E8F#373E8F
HEX#373E8F
RGBrgb(55, 62, 143)
RGB (0–1)0.2157, 0.2431, 0.5608
RGB percentages21.6%, 24.3%, 56.1%
HSLhsl(235.2, 44.4%, 38.8%)
HSV / HSBhsv(235.2, 61.5%, 56.1%)
CMYK61.5%, 56.6%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,495
CSS custom property--colour: #373E8F;

Brightness & contrast

Relative luminance0.06241WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.34:1
Contrast with white9.34:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#C8C170

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#014B92no red cones; affects about 1% of men; ΔE 14 from the original
Deuteranopia#00438Dno green cones; the most common form, about 1% of men; ΔE 10.5 from the original
Tritanopia#005160no blue cones; rare, and affects men and women equally; ΔE 49.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.34:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 4.9Midnight blue · ΔE 17Rebecca purple · ΔE 20Slate blue · ΔE 23.3Royal blue · ΔE 26.5Medium purple · ΔE 28.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 4.92, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F8837
Analogous#376A8F, #5C378F
Triadic#8F373E, #3E8F37
Split complementary#8F5C37, #6A8F37
Tetradic#8F376A, #8F8837, #378F5C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B1B5E1
Lighter +30%#8C92D3
Lighter +20%#676FC5
Lighter +10%#454EB4
Darker −10%#292E6A
Darker −20%#1B1E45
Darker −30%#0D0E21
Darker −40%#000000
More saturated +25%#1E29A8
Less saturated −25%#505376

Channel breakdown

R55
G62
B143
Red55 (21.6%)
Green62 (24.3%)
Blue143 (56.1%)
Hue235.23°
Saturation (HSL)44.44%
Lightness38.82%
Dominant channelBlue
Hex per channelR 37 · G 3E · B 8F

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Every value on this page was computed from “373e8f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.