#666EE5#666EE5
#666EE5 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.3% C 0.177 H 276.6°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).
Color values
| HEX | #666EE5 |
|---|---|
| RGB | rgb(102, 110, 229) |
| HSL | hsl(236, 71%, 65%) |
| HSV | hsv(236, 55%, 90%) |
| CMYK | cmyk(55.5%, 52%, 0%, 10.2%) |
| CIE-LAB | lab(51.42, 30.59, -61.62) |
| CIE-LCH | lch(51.42, 68.79, 296.40°) |
| OKLab | oklab(59.32% 0.0205 -0.1762) |
| OKLCH | oklch(59.32% 0.177 276.6) |
| XYZ | xyz(25.1938, 19.6320, 76.5753) |
| Luminance | 0.1963 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 4.31
Cornflower Blue
#5170D7
ΔE00 4.50
Mediumslateblue
#7B68EE
ΔE00 4.57
Royal Blue
#4169E1
ΔE00 5.46
Dark Periwinkle
#665FD1
ΔE00 5.80
Lightish Blue
#3D7AFD
ΔE00 7.54
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EE5 #E5DD66
analogous
#66AEE5 #666EE5 #9D66E5
triadic
#666EE5 #E5666E #6EE566
tetradic
#666EE5 #E566AE #E5DD66 #66E59D
square
#666EE5 #E566AE #E5DD66 #66E59D
split-complementary
#666EE5 #E59D66 #AEE566
monochromatic
#1E28B2 #323CDC #666EE5 #9AA0EE #CFD1F7
Accessibility & contrast
On white
4.26
#666EE5 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.93
#666EE5 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EE5
4.93:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EE5 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EE5 | 1.00 | 4.26 | 4.93 | 4.93 |
| #FFFFFF | 4.26 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.93 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.93 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2B80E9
Deuteranopia (green-blind)
#0E75E2
Tritanopia (blue-blind)
#20899F
Achromatopsia (no color)
#7A7A7A
Design tokens & code
CSS
--color: #666ee5; /* rgb */ color: rgb(102, 110, 229); /* oklch */ color: oklch(59.3% 0.177 276.6);
Tailwind
colors: {
custom: {
50: '#9b97ee',
500: '#666ee5',
950: '#000000',
},
}SCSS
$custom: #666ee5; $custom-light: #9b97ee; $custom-dark: #000000;
JSON
{
"hex": "#666ee5",
"rgb": {
"r": 102,
"g": 110,
"b": 229
},
"hsl": {
"h": 236.22,
"s": 70.95,
"l": 64.902
},
"oklch": {
"l": 0.59317,
"c": 0.17744,
"h": 276.6
},
"luminance": 0.19634
}Semantic roles & 50–950 ramp
primary
#666EE5
secondary
#E9E6BE
accent
#C713D3
background
#FAF9FE
surface
#F4F2FD
border
#CECCD5
text
#0F0D16
muted
#7F7E84