#666CF9#666CF9
#666CF9 is a mid, highly saturated blue. Relative luminance 0.204; OKLCH L 60.4% C 0.206 H 276.4°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).
Color values
| HEX | #666CF9 |
|---|---|
| RGB | rgb(102, 108, 249) |
| HSL | hsl(238, 92%, 69%) |
| HSV | hsv(238, 59%, 98%) |
| CMYK | cmyk(59%, 56.6%, 0%, 2.4%) |
| CIE-LAB | lab(52.27, 38.16, -71.41) |
| CIE-LCH | lch(52.27, 80.97, 298.12°) |
| OKLab | oklab(60.38% 0.0232 -0.2051) |
| OKLCH | oklch(60.38% 0.206 276.4) |
| XYZ | xyz(27.9354, 20.3873, 92.0672) |
| Luminance | 0.2039 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Mediumslateblue
#7B68EE
ΔE00 3.98
Cornflower
#6A79F7
ΔE00 4.04
Cornflower Blue
#5170D7
ΔE00 6.34
Royal Blue
#4169E1
ΔE00 6.59
Dark Periwinkle
#665FD1
ΔE00 7.06
Bright Blue
#0165FC
ΔE00 7.56
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666CF9 #F9F366
analogous
#66B6F9 #666CF9 #AA66F9
triadic
#666CF9 #F9666C #6CF966
tetradic
#666CF9 #F966B6 #F9F366 #66F9AA
square
#666CF9 #F966B6 #F9F366 #66F9AA
split-complementary
#666CF9 #F9AA66 #B6F966
monochromatic
#0911DC #2B33F7 #666CF9 #A1A5FB #DCDDFE
Accessibility & contrast
On white
4.14
#666CF9 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.08
#666CF9 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666CF9
5.08:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666CF9 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666CF9 | 1.00 | 4.14 | 5.08 | 5.08 |
| #FFFFFF | 4.14 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.08 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.08 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0083FE
Deuteranopia (green-blind)
#0077F6
Tritanopia (blue-blind)
#008EA8
Achromatopsia (no color)
#7D7D7D
Design tokens & code
CSS
--color: #666cf9; /* rgb */ color: rgb(102, 108, 249); /* oklch */ color: oklch(60.4% 0.206 276.4);
Tailwind
colors: {
custom: {
50: '#9e96fc',
500: '#666cf9',
950: '#000000',
},
}SCSS
$custom: #666cf9; $custom-light: #9e96fc; $custom-dark: #000000;
JSON
{
"hex": "#666cf9",
"rgb": {
"r": 102,
"g": 108,
"b": 249
},
"hsl": {
"h": 237.551,
"s": 92.453,
"l": 68.824
},
"oklch": {
"l": 0.60379,
"c": 0.20638,
"h": 276.4
},
"luminance": 0.20389
}Semantic roles & 50–950 ramp
primary
#666CF9
secondary
#F3F1C8
accent
#DC00E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D18
muted
#7F7E86