#666EFD#666EFD
#666EFD is a mid, highly saturated blue. Relative luminance 0.211; OKLCH L 61.0% C 0.209 H 275.9°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).
Color values
| HEX | #666EFD |
|---|---|
| RGB | rgb(102, 110, 253) |
| HSL | hsl(237, 97%, 70%) |
| HSV | hsv(237, 60%, 99%) |
| CMYK | cmyk(59.7%, 56.5%, 0%, 0.8%) |
| CIE-LAB | lab(53.02, 38.24, -72.41) |
| CIE-LCH | lch(53.02, 81.89, 297.84°) |
| OKLab | oklab(61.02% 0.0214 -0.208) |
| OKLCH | oklch(61.02% 0.209 275.9) |
| XYZ | xyz(28.7793, 21.0663, 95.4591) |
| Luminance | 0.2107 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.43
Mediumslateblue
#7B68EE
ΔE00 4.43
Cornflower Blue
#5170D7
ΔE00 6.56
Royal Blue
#4169E1
ΔE00 6.96
Lightish Blue
#3D7AFD
ΔE00 7.17
Bright Blue
#0165FC
ΔE00 7.80
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EFD #FDF566
analogous
#66BAFD #666EFD #A966FD
triadic
#666EFD #FD666E #6EFD66
tetradic
#666EFD #FD66BA #FDF566 #66FDA9
square
#666EFD #FD66BA #FDF566 #66FDA9
split-complementary
#666EFD #FDA966 #BAFD66
monochromatic
#030FE6 #2A35FC #666EFD #A2A7FE #DFE1FF
Accessibility & contrast
On white
4.03
#666EFD on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.21
#666EFD on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EFD
5.21:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EFD | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EFD | 1.00 | 4.03 | 5.21 | 5.21 |
| #FFFFFF | 4.03 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.21 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.21 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0085FF
Deuteranopia (green-blind)
#0078FA
Tritanopia (blue-blind)
#0090AB
Achromatopsia (no color)
#7F7F7F
Design tokens & code
CSS
--color: #666efd; /* rgb */ color: rgb(102, 110, 253); /* oklch */ color: oklch(61.0% 0.209 275.9);
Tailwind
colors: {
custom: {
50: '#9f97ff',
500: '#666efd',
950: '#000000',
},
}SCSS
$custom: #666efd; $custom-light: #9f97ff; $custom-dark: #000000;
JSON
{
"hex": "#666efd",
"rgb": {
"r": 102,
"g": 110,
"b": 253
},
"hsl": {
"h": 236.821,
"s": 97.419,
"l": 69.608
},
"oklch": {
"l": 0.61023,
"c": 0.2091,
"h": 275.9
},
"luminance": 0.21068
}Semantic roles & 50–950 ramp
primary
#666EFD
secondary
#F5F3CA
accent
#D900E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D18
muted
#7F7E86