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Recognised as Colour

#A637FF

  • #A637FF
  • Violet
  • Dark
  • Nearest: Blue violet

#A637FF is a violet with RGB values 166, 55, 255 and HSL 273°, 100%, 61%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Blue violet.

Colour values

#A637FF#A637FF
HEX#A637FF
RGBrgb(166, 55, 255)
RGB (0–1)0.651, 0.2157, 1
RGB percentages65.1%, 21.6%, 100%
HSLhsl(273.3, 100%, 60.8%)
HSV / HSBhsv(273.3, 78.4%, 100%)
CMYK34.9%, 78.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,893,311
CSS custom property--colour: #A637FF;

Brightness & contrast

Relative luminance0.18059WCAG 2.x, 0 is black and 1 is white
Perceived brightness132 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.61:1
Contrast with white4.55:1WCAG normal text: AA
Contrast with black4.61:1WCAG normal text: AA
Greyscale equivalent#5D5D5D
Inverted#59C800

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0073FFno red cones; affects about 1% of men; ΔE 49.4 from the original
Deuteranopia#0076FBno green cones; the most common form, about 1% of men; ΔE 53 from the original
Tritanopia#946D9Cno blue cones; rare, and affects men and women equally; ΔE 79.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.55:1WCAG large text: AAA
Contrast with black, large text4.61:1WCAG large text: AAA

Named colours

Blue violet · ΔE 10.6Dark violet · ΔE 13.1Dark orchid · ΔE 22.7Medium blue · ΔE 29.1Fuchsia · ΔE 30.4Magenta · ΔE 30.4
Nearest named CSS colourBlue violet (#8A2BE2)ΔE 10.59, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#90FF37
Analogous#4237FF, #FF37F4
Triadic#FFA637, #37FFA6
Split complementary#F4FF37, #37FF42
Tetradic#FF4237, #90FF37, #37F4FF

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EAD0FF
Lighter +20%#D39DFF
Lighter +10%#BD6AFF
Darker −10%#8F04FF
Darker −20%#7300D0
Darker −30%#57009D
Darker −40%#3B006A
More saturated +25%#A637FF
Less saturated −25%#A350E6

Channel breakdown

R166
G55
B255
Red166 (65.1%)
Green55 (21.6%)
Blue255 (100%)
Hue273.3°
Saturation (HSL)100%
Lightness60.78%
Dominant channelBlue
Hex per channelR A6 · G 37 · B FF

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Every value on this page was computed from “a637ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.