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Recognised as Colour

#555EB2

  • #555EB2
  • Blue
  • Dark
  • Nearest: Dark slateblue

#555EB2 is a blue with RGB values 85, 94, 178 and HSL 234°, 38%, 52%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#555EB2#555EB2
HEX#555EB2
RGBrgb(85, 94, 178)
RGB (0–1)0.3333, 0.3686, 0.698
RGB percentages33.3%, 36.9%, 69.8%
HSLhsl(234.2, 37.7%, 51.6%)
HSV / HSBhsv(234.2, 52.2%, 69.8%)
CMYK52.2%, 47.2%, 0%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,594,802
CSS custom property--colour: #555EB2;

Brightness & contrast

Relative luminance0.13151WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.78:1
Contrast with white5.78:1WCAG normal text: AA
Contrast with black3.63:1WCAG normal text: Fail
Greyscale equivalent#626262
Inverted#AAA14D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3969B5no red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#2F62B0no green cones; the most common form, about 1% of men; ΔE 10.4 from the original
Tritanopia#2D707Fno blue cones; rare, and affects men and women equally; ΔE 48.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.78:1WCAG large text: AAA
Contrast with black, large text3.63:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 13.9Slate blue · ΔE 19.6Medium purple · ΔE 20.6Royal blue · ΔE 20.7Cornflower blue · ΔE 22.3Rebecca purple · ΔE 24.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B2A955
Analogous#558CB2, #7B55B2
Triadic#B2555E, #5EB255
Split complementary#B27A55, #8CB255
Tetradic#B2558C, #B2A955, #55B27A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E1E3F2
Lighter +30%#BEC2E2
Lighter +20%#9BA0D2
Lighter +10%#787FC2
Darker −10%#424A92
Darker −20%#32386F
Darker −30%#22264C
Darker −40%#121529
More saturated +25%#3645D1
Less saturated −25%#747793

Channel breakdown

R85
G94
B178
Red85 (33.3%)
Green94 (36.9%)
Blue178 (69.8%)
Hue234.19°
Saturation (HSL)37.65%
Lightness51.57%
Dominant channelBlue
Hex per channelR 55 · G 5E · B B2

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Every value on this page was computed from “555eb2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.