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Recognised as Colour

#66538E

  • #66538E
  • Violet
  • Dark
  • Nearest: Dark slateblue

#66538E is a violet with RGB values 102, 83, 142 and HSL 259°, 26%, 44%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#66538E#66538E
HEX#66538E
RGBrgb(102, 83, 142)
RGB (0–1)0.4, 0.3255, 0.5569
RGB percentages40%, 32.5%, 55.7%
HSLhsl(259.3, 26.2%, 44.1%)
HSV / HSBhsv(259.3, 41.5%, 55.7%)
CMYK28.2%, 41.5%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,706,062
CSS custom property--colour: #66538E;

Brightness & contrast

Relative luminance0.10964WCAG 2.x, 0 is black and 1 is white
Perceived brightness97.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.58:1
Contrast with white6.58:1WCAG normal text: AA
Contrast with black3.19:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#99AC71

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#435D90no red cones; affects about 1% of men; ΔE 15.6 from the original
Deuteranopia#465C8Cno green cones; the most common form, about 1% of men; ΔE 15.5 from the original
Tritanopia#5E5D69no blue cones; rare, and affects men and women equally; ΔE 29.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.58:1WCAG large text: AAA
Contrast with black, large text3.19:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 15.7Rebecca purple · ΔE 28.4Steel blue · ΔE 28.6Medium purple · ΔE 29.8Cornflower blue · ΔE 31.9Slate blue · ΔE 32.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.7, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7B8E53
Analogous#535D8E, #84538E
Triadic#8E6653, #538E66
Split complementary#8E8453, #5D8E53
Tetradic#8E535D, #7B8E53, #538E84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3CCE1
Lighter +30%#B7ACCE
Lighter +20%#9B8CBB
Lighter +10%#7F6BA9
Darker −10%#4F406E
Darker −20%#382D4E
Darker −30%#211B2D
Darker −40%#0A080D
More saturated +25%#5C37AA
Less saturated −25%#706F72

Channel breakdown

R102
G83
B142
Red102 (40%)
Green83 (32.5%)
Blue142 (55.7%)
Hue259.32°
Saturation (HSL)26.22%
Lightness44.12%
Dominant channelBlue
Hex per channelR 66 · G 53 · B 8E

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Every value on this page was computed from “66538e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.