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Recognised as Colour

#5155AF

  • #5155AF
  • Blue
  • Dark
  • Nearest: Dark slateblue

#5155AF is a blue with RGB values 81, 85, 175 and HSL 237°, 37%, 50%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#5155AF#5155AF
HEX#5155AF
RGBrgb(81, 85, 175)
RGB (0–1)0.3176, 0.3333, 0.6863
RGB percentages31.8%, 33.3%, 68.6%
HSLhsl(237.4, 37%, 50.2%)
HSV / HSBhsv(237.4, 53.7%, 68.6%)
CMYK53.7%, 51.4%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,330,351
CSS custom property--colour: #5155AF;

Brightness & contrast

Relative luminance0.11341WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.43:1
Contrast with white6.43:1WCAG normal text: AA
Contrast with black3.27:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#AEAA50

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2762B2no red cones; affects about 1% of men; ΔE 14.5 from the original
Deuteranopia#1B5BADno green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#26697Ano blue cones; rare, and affects men and women equally; ΔE 51.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.43:1WCAG large text: AAA
Contrast with black, large text3.27:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 11.6Slate blue · ΔE 15.6Royal blue · ΔE 18.3Medium purple · ΔE 19.4Rebecca purple · ΔE 19.9Midnight blue · ΔE 25.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AFAB51
Analogous#5184AF, #7C51AF
Triadic#AF5155, #55AF51
Split complementary#AF7C51, #84AF51
Tetradic#AF5184, #AFAB51, #51AF7C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDDEEF
Lighter +30%#BABBDF
Lighter +20%#9799CF
Lighter +10%#7477BF
Darker −10%#41448C
Darker −20%#313369
Darker −30%#202247
Darker −40%#101124
More saturated +25%#3138CF
Less saturated −25%#71728F

Channel breakdown

R81
G85
B175
Red81 (31.8%)
Green85 (33.3%)
Blue175 (68.6%)
Hue237.45°
Saturation (HSL)37.01%
Lightness50.2%
Dominant channelBlue
Hex per channelR 51 · G 55 · B AF

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Every value on this page was computed from “5155af” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.