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Colour

#373AC8

  • #373AC8
  • Blue
  • Dark
  • Nearest: Medium slateblue

#373AC8 is a blue with RGB values 55, 58, 200 and HSL 239°, 57%, 50%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#373AC8#373AC8
HEX#373AC8
RGBrgb(55, 58, 200)
RGB (0–1)0.2157, 0.2275, 0.7843
RGB percentages21.6%, 22.7%, 78.4%
HSLhsl(238.8, 56.9%, 50%)
HSV / HSBhsv(238.8, 72.5%, 78.4%)
CMYK72.5%, 71%, 0%, 21.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,619,528
CSS custom property--colour: #373AC8;

Brightness & contrast

Relative luminance0.08008WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.07:1
Contrast with white8.07:1WCAG normal text: AAA
Contrast with black2.6:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#C8C537

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0057CCno red cones; affects about 1% of men; ΔE 22.4 from the original
Deuteranopia#0049C5no green cones; the most common form, about 1% of men; ΔE 14.6 from the original
Tritanopia#00627Dno blue cones; rare, and affects men and women equally; ΔE 78.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.07:1WCAG large text: AAA
Contrast with black, large text2.6:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 20.4Dark blue · ΔE 20.5Slate blue · ΔE 21.6Navy · ΔE 22.9Royal blue · ΔE 25Indigo · ΔE 25.1
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 20.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C8C537
Analogous#3783C8, #7C37C8
Triadic#C8373A, #3AC837
Split complementary#C87D37, #83C837
Tetradic#C83783, #C8C537, #37C87D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D7D8F4
Lighter +30%#AFB0E9
Lighter +20%#8789DE
Lighter +10%#5F61D3
Darker −10%#2C2EA0
Darker −20%#212378
Darker −30%#161750
Darker −40%#0B0C28
More saturated +25%#171BE8
Less saturated −25%#5759A8

Channel breakdown

R55
G58
B200
Red55 (21.6%)
Green58 (22.7%)
Blue200 (78.4%)
Hue238.76°
Saturation (HSL)56.86%
Lightness50%
Dominant channelBlue
Hex per channelR 37 · G 3A · B C8

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Every value on this page was computed from “373ac8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.