#663FA3#663FA3
#663FA3 is a mid, vivid violet. Relative luminance 0.090; OKLCH L 46.5% C 0.155 H 298.1°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).
Color values
| HEX | #663FA3 |
|---|---|
| RGB | rgb(102, 63, 163) |
| HSL | hsl(263, 44%, 44%) |
| HSV | hsv(263, 61%, 64%) |
| CMYK | cmyk(37.4%, 61.3%, 0%, 36.1%) |
| CIE-LAB | lab(36.03, 38.95, -48.14) |
| CIE-LCH | lch(36.03, 61.92, 308.97°) |
| OKLab | oklab(46.52% 0.073 -0.1368) |
| OKLCH | oklch(46.52% 0.155 298.1) |
| XYZ | xyz(13.8662, 9.0240, 35.6545) |
| Luminance | 0.0902 (WCAG relative) |
| Temperature | cool |
| Family | violet |
Closest named colors
Rebeccapurple
#663399
ΔE00 3.35
Ocean Blue
#4F42B5
ΔE00 5.66
Bluey Purple
#6241C7
ΔE00 5.78
Royal Purple
#7851A9
ΔE00 6.00
Blue With A Hint Of Purple
#533CC6
ΔE00 6.58
Darkslateblue
#483D8B
ΔE00 6.68
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#663FA3 #7CA33F
analogous
#3F4AA3 #663FA3 #983FA3
triadic
#663FA3 #A3663F #3FA366
tetradic
#663FA3 #A33F4A #7CA33F #3FA398
square
#663FA3 #A33F4A #7CA33F #3FA398
split-complementary
#663FA3 #A3983F #4AA33F
monochromatic
#2F1D4B #4A2E77 #663FA3 #855EC1 #A68AD2
Accessibility & contrast
On white
7.49
#663FA3 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.80
#663FA3 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #663FA3
7.49:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##663FA3 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##663FA3 | 1.00 | 7.49 | 2.80 | 7.49 |
| #FFFFFF | 7.49 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.80 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.49 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0055A6
Deuteranopia (green-blind)
#1654A1
Tritanopia (blue-blind)
#58556B
Achromatopsia (no color)
#555555
Design tokens & code
CSS
--color: #663fa3; /* rgb */ color: rgb(102, 63, 163); /* oklch */ color: oklch(46.5% 0.155 298.1);
Tailwind
colors: {
custom: {
50: '#9676bf',
500: '#663fa3',
950: '#000000',
},
}SCSS
$custom: #663fa3; $custom-light: #9676bf; $custom-dark: #000000;
JSON
{
"hex": "#663fa3",
"rgb": {
"r": 102,
"g": 63,
"b": 163
},
"hsl": {
"h": 263.4,
"s": 44.248,
"l": 44.314
},
"oklch": {
"l": 0.46517,
"c": 0.15509,
"h": 298.1
},
"luminance": 0.09024
}Semantic roles & 50–950 ramp
primary
#663FA3
secondary
#A5BD81
accent
#D454A2
background
#F9F7FB
surface
#F2EDF7
border
#CCC8D0
text
#0E0812
muted
#7E7B81