Colour
Rebecca purple
- #663399
- Violet
- Dark
- Named: Rebecca purple
#663399 is the CSS colour violet with RGB values 102, 51, 153 and HSL 270°, 50%, 40%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.
The canonical address for this page is /663399.
Colour values
#663399#663399
HEX#663399
HEX (short)#639
RGBrgb(102, 51, 153)
RGB (0–1)0.4, 0.2, 0.6
RGB percentages40%, 20%, 60%
HSLhsl(270, 50%, 40%)
HSV / HSBhsv(270, 66.7%, 60%)
CMYK33.3%, 66.7%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,697,881
CSS custom property--colour: #663399;
Brightness & contrast
Relative luminance0.07492WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.41:1
Contrast with white8.41:1WCAG normal text: AAA
Contrast with black2.5:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#99CC66
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.41:1WCAG large text: AAA
Contrast with black, large text2.5:1WCAG large text: Fail
Named colours
Hue familyviolet
CSS keyword usablerebeccapurple
Colour harmonies
Complementary#669933
Analogous#333399, #993399
Triadic#996633, #339966
Split complementary#999933, #339933
Tetradic#993333, #669933, #339999
Tints, shades & saturation
Channel breakdown
R102
G51
B153
Red102 (40%)
Green51 (20%)
Blue153 (60%)
Hue270°
Saturation (HSL)50%
Lightness40%
Dominant channelBlue
Hex per channelR 66 · G 33 · B 99
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Harmonies
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