#663E8B#663E8B
#663E8B is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.7% C 0.126 H 305.9°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).
Color values
| HEX | #663E8B |
|---|---|
| RGB | rgb(102, 62, 139) |
| HSL | hsl(271, 38%, 39%) |
| HSV | hsv(271, 55%, 55%) |
| CMYK | cmyk(26.6%, 55.4%, 0%, 45.5%) |
| CIE-LAB | lab(34.26, 33.22, -36.41) |
| CIE-LCH | lch(34.26, 49.29, 312.38°) |
| OKLab | oklab(44.72% 0.0741 -0.1024) |
| OKLCH | oklch(44.72% 0.126 305.9) |
| XYZ | xyz(11.8613, 8.1342, 25.3663) |
| Luminance | 0.0813 (WCAG relative) |
| Temperature | cool |
| Family | violet |
Closest named colors
Rebeccapurple
#663399
ΔE00 4.23
Darkslateblue
#483D8B
ΔE00 6.87
Royal Purple
#7851A9
ΔE00 7.29
Purple (survey)
#7E1E9C
ΔE00 7.83
Blueberry
#464196
ΔE00 8.15
Light Eggplant
#894585
ΔE00 9.33
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#663E8B #638B3E
analogous
#403E8B #663E8B #8B3E8A
triadic
#663E8B #8B663E #3E8B66
tetradic
#663E8B #8B403E #638B3E #3E8A8B
square
#663E8B #8B403E #638B3E #3E8A8B
split-complementary
#663E8B #8A8B3E #3E8B40
monochromatic
#281836 #472B61 #663E8B #8554B3 #A37EC5
Accessibility & contrast
On white
7.99
#663E8B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.63
#663E8B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #663E8B
7.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##663E8B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##663E8B | 1.00 | 7.99 | 2.63 | 7.99 |
| #FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#244F8E
Deuteranopia (green-blind)
#325189
Tritanopia (blue-blind)
#604C5E
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #663e8b; /* rgb */ color: rgb(102, 62, 139); /* oklch */ color: oklch(44.7% 0.126 305.9);
Tailwind
colors: {
custom: {
50: '#9475ad',
500: '#663e8b',
950: '#000000',
},
}SCSS
$custom: #663e8b; $custom-light: #9475ad; $custom-dark: #000000;
JSON
{
"hex": "#663e8b",
"rgb": {
"r": 102,
"g": 62,
"b": 139
},
"hsl": {
"h": 271.169,
"s": 38.308,
"l": 39.412
},
"oklch": {
"l": 0.44722,
"c": 0.12641,
"h": 305.9
},
"luminance": 0.08134
}Semantic roles & 50–950 ramp
primary
#663E8B
secondary
#91B075
accent
#CE5A92
background
#F9F7FA
surface
#F2EDF4
border
#CCC8CE
text
#0D0810
muted
#7E7B7F