#666EFC#666EFC
#666EFC is a mid, highly saturated blue. Relative luminance 0.210; OKLCH L 61.0% C 0.208 H 275.9°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).
Color values
| HEX | #666EFC |
|---|---|
| RGB | rgb(102, 110, 252) |
| HSL | hsl(237, 96%, 69%) |
| HSV | hsv(237, 60%, 99%) |
| CMYK | cmyk(59.5%, 56.3%, 0%, 1.2%) |
| CIE-LAB | lab(52.95, 37.92, -71.97) |
| CIE-LCH | lch(52.95, 81.35, 297.79°) |
| OKLab | oklab(60.95% 0.0214 -0.2067) |
| OKLCH | oklch(60.95% 0.208 275.9) |
| XYZ | xyz(28.6204, 21.0027, 94.6223) |
| Luminance | 0.2100 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.43
Mediumslateblue
#7B68EE
ΔE00 4.40
Cornflower Blue
#5170D7
ΔE00 6.46
Royal Blue
#4169E1
ΔE00 6.87
Lightish Blue
#3D7AFD
ΔE00 7.16
Bright Blue
#0165FC
ΔE00 7.76
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EFC #FCF466
analogous
#66B9FC #666EFC #A966FC
triadic
#666EFC #FC666E #6EFC66
tetradic
#666EFC #FC66B9 #FCF466 #66FCA9
square
#666EFC #FC66B9 #FCF466 #66FCA9
split-complementary
#666EFC #FCA966 #B9FC66
monochromatic
#0410E3 #2A35FB #666EFC #A2A7FD #DEE0FE
Accessibility & contrast
On white
4.04
#666EFC on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.20
#666EFC on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EFC
5.20:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EFC | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EFC | 1.00 | 4.04 | 5.20 | 5.20 |
| #FFFFFF | 4.04 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.20 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.20 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0085FF
Deuteranopia (green-blind)
#0078F9
Tritanopia (blue-blind)
#0090AA
Achromatopsia (no color)
#7E7E7E
Design tokens & code
CSS
--color: #666efc; /* rgb */ color: rgb(102, 110, 252); /* oklch */ color: oklch(61.0% 0.208 275.9);
Tailwind
colors: {
custom: {
50: '#9f97fe',
500: '#666efc',
950: '#000000',
},
}SCSS
$custom: #666efc; $custom-light: #9f97fe; $custom-dark: #000000;
JSON
{
"hex": "#666efc",
"rgb": {
"r": 102,
"g": 110,
"b": 252
},
"hsl": {
"h": 236.8,
"s": 96.154,
"l": 69.412
},
"oklch": {
"l": 0.6095,
"c": 0.20782,
"h": 275.9
},
"luminance": 0.21005
}Semantic roles & 50–950 ramp
primary
#666EFC
secondary
#F5F2C9
accent
#D900E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D18
muted
#7F7E86