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Recognised as Colour

#A637BF

  • #A637BF
  • Violet
  • Dark
  • Nearest: Medium orchid

#A637BF is a violet with RGB values 166, 55, 191 and HSL 289°, 55%, 48%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Medium orchid.

Colour values

#A637BF#A637BF
HEX#A637BF
RGBrgb(166, 55, 191)
RGB (0–1)0.651, 0.2157, 0.749
RGB percentages65.1%, 21.6%, 74.9%
HSLhsl(289, 55.3%, 48.2%)
HSV / HSBhsv(289, 71.2%, 74.9%)
CMYK13.1%, 71.2%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,893,247
CSS custom property--colour: #A637BF;

Brightness & contrast

Relative luminance0.14601WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.36:1
Contrast with white5.36:1WCAG normal text: AA
Contrast with black3.92:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#59C840

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0063C3no red cones; affects about 1% of men; ΔE 50.3 from the original
Deuteranopia#426EBCno green cones; the most common form, about 1% of men; ΔE 53.5 from the original
Tritanopia#A65178no blue cones; rare, and affects men and women equally; ΔE 50 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.36:1WCAG large text: AAA
Contrast with black, large text3.92:1WCAG large text: AA

Named colours

Medium orchid · ΔE 9.8Dark orchid · ΔE 10.7Dark magenta · ΔE 16.6Purple · ΔE 20.7Rebecca purple · ΔE 23.9Orchid · ΔE 24.8
Nearest named CSS colourMedium orchid (#BA55D3)ΔE 9.84, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#50BF37
Analogous#6237BF, #BF3794
Triadic#BFA637, #37BFA6
Split complementary#94BF37, #37BF62
Tetradic#BF6237, #50BF37, #3794BF

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBD0F2
Lighter +30%#DBA9E6
Lighter +20%#CA81DB
Lighter +10%#BA5ACF
Darker −10%#842C97
Darker −20%#612070
Darker −30%#3F1548
Darker −40%#1C0921
More saturated +25%#B918DE
Less saturated −25%#9356A0

Channel breakdown

R166
G55
B191
Red166 (65.1%)
Green55 (21.6%)
Blue191 (74.9%)
Hue288.97°
Saturation (HSL)55.28%
Lightness48.24%
Dominant channelBlue
Hex per channelR A6 · G 37 · B BF

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Every value on this page was computed from “a637bf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.