#666EEA#666EEA
#666EEA is a mid, vivid blue. Relative luminance 0.199; OKLCH L 59.7% C 0.184 H 276.5°. Best body text is #000000 at 4.98:1 contrast (WCAG AA passes).
Color values
| HEX | #666EEA |
|---|---|
| RGB | rgb(102, 110, 234) |
| HSL | hsl(236, 76%, 66%) |
| HSV | hsv(236, 56%, 92%) |
| CMYK | cmyk(56.4%, 53%, 0%, 8.2%) |
| CIE-LAB | lab(51.74, 32.18, -63.90) |
| CIE-LCH | lch(51.74, 71.55, 296.73°) |
| OKLab | oklab(59.66% 0.0208 -0.183) |
| OKLCH | oklch(59.66% 0.184 276.5) |
| XYZ | xyz(25.9019, 19.9153, 80.3051) |
| Luminance | 0.1992 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.95
Mediumslateblue
#7B68EE
ΔE00 4.37
Cornflower Blue
#5170D7
ΔE00 4.85
Royal Blue
#4169E1
ΔE00 5.66
Dark Periwinkle
#665FD1
ΔE00 6.17
Lightish Blue
#3D7AFD
ΔE00 7.35
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EEA #EAE266
analogous
#66B0EA #666EEA #A066EA
triadic
#666EEA #EA666E #6EEA66
tetradic
#666EEA #EA66B0 #EAE266 #66EAA0
square
#666EEA #EA66B0 #EAE266 #66EAA0
split-complementary
#666EEA #EAA066 #B0EA66
monochromatic
#1A24BC #303BE3 #666EEA #9CA1F1 #D2D4F9
Accessibility & contrast
On white
4.21
#666EEA on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.98
#666EEA on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EEA
4.98:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EEA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EEA | 1.00 | 4.21 | 4.98 | 4.98 |
| #FFFFFF | 4.21 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.98 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.98 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2281EE
Deuteranopia (green-blind)
#0076E7
Tritanopia (blue-blind)
#158BA1
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #666eea; /* rgb */ color: rgb(102, 110, 234); /* oklch */ color: oklch(59.7% 0.184 276.5);
Tailwind
colors: {
custom: {
50: '#9c97f1',
500: '#666eea',
950: '#000000',
},
}SCSS
$custom: #666eea; $custom-light: #9c97f1; $custom-dark: #000000;
JSON
{
"hex": "#666eea",
"rgb": {
"r": 102,
"g": 110,
"b": 234
},
"hsl": {
"h": 236.364,
"s": 75.862,
"l": 65.882
},
"oklch": {
"l": 0.59662,
"c": 0.18416,
"h": 276.5
},
"luminance": 0.19917
}Semantic roles & 50–950 ramp
primary
#666EEA
secondary
#ECE9C0
accent
#CC0DD8
background
#FAF9FE
surface
#F4F2FD
border
#CECCD5
text
#0F0D17
muted
#7F7E85