#666CF4#666CF4
#666CF4 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 60.0% C 0.200 H 276.6°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).
Color values
| HEX | #666CF4 |
|---|---|
| RGB | rgb(102, 108, 244) |
| HSL | hsl(237, 87%, 68%) |
| HSV | hsv(237, 58%, 96%) |
| CMYK | cmyk(58.2%, 55.7%, 0%, 4.3%) |
| CIE-LAB | lab(51.93, 36.57, -69.19) |
| CIE-LCH | lch(51.93, 78.26, 297.86°) |
| OKLab | oklab(60.01% 0.0231 -0.1985) |
| OKLCH | oklch(60.01% 0.2 276.6) |
| XYZ | xyz(27.1659, 20.0795, 88.0146) |
| Luminance | 0.2008 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Mediumslateblue
#7B68EE
ΔE00 3.89
Cornflower
#6A79F7
ΔE00 4.13
Cornflower Blue
#5170D7
ΔE00 5.89
Royal Blue
#4169E1
ΔE00 6.22
Dark Periwinkle
#665FD1
ΔE00 6.56
Bright Blue
#0165FC
ΔE00 7.45
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666CF4 #F4EE66
analogous
#66B3F4 #666CF4 #A766F4
triadic
#666CF4 #F4666C #6CF466
tetradic
#666CF4 #F466B3 #F4EE66 #66F4A7
square
#666CF4 #F466B3 #F4EE66 #66F4A7
split-complementary
#666CF4 #F4A766 #B3F466
monochromatic
#0F17D1 #2D35F0 #666CF4 #9FA3F8 #D8DAFC
Accessibility & contrast
On white
4.19
#666CF4 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.02
#666CF4 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666CF4
5.02:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666CF4 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666CF4 | 1.00 | 4.19 | 5.02 | 5.02 |
| #FFFFFF | 4.19 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.02 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.02 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0082F9
Deuteranopia (green-blind)
#0076F1
Tritanopia (blue-blind)
#008CA6
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #666cf4; /* rgb */ color: rgb(102, 108, 244); /* oklch */ color: oklch(60.0% 0.200 276.6);
Tailwind
colors: {
custom: {
50: '#9d96f9',
500: '#666cf4',
950: '#000000',
},
}SCSS
$custom: #666cf4; $custom-light: #9d96f9; $custom-dark: #000000;
JSON
{
"hex": "#666cf4",
"rgb": {
"r": 102,
"g": 108,
"b": 244
},
"hsl": {
"h": 237.465,
"s": 86.585,
"l": 67.843
},
"oklch": {
"l": 0.60013,
"c": 0.19989,
"h": 276.6
},
"luminance": 0.20082
}Semantic roles & 50–950 ramp
primary
#666CF4
secondary
#F1EFC5
accent
#DA02E3
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D17
muted
#7F7E85