#666EED#666EED
#666EED is a mid, vivid blue. Relative luminance 0.201; OKLCH L 59.9% C 0.188 H 276.4°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).
Color values
| HEX | #666EED |
|---|---|
| RGB | rgb(102, 110, 237) |
| HSL | hsl(236, 79%, 66%) |
| HSV | hsv(236, 57%, 93%) |
| CMYK | cmyk(57%, 53.6%, 0%, 7.1%) |
| CIE-LAB | lab(51.94, 33.13, -65.27) |
| CIE-LCH | lch(51.94, 73.20, 296.92°) |
| OKLab | oklab(59.87% 0.021 -0.187) |
| OKLCH | oklch(59.87% 0.188 276.4) |
| XYZ | xyz(26.3366, 20.0892, 82.5941) |
| Luminance | 0.2009 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.78
Mediumslateblue
#7B68EE
ΔE00 4.29
Cornflower Blue
#5170D7
ΔE00 5.09
Royal Blue
#4169E1
ΔE00 5.81
Dark Periwinkle
#665FD1
ΔE00 6.41
Lightish Blue
#3D7AFD
ΔE00 7.27
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EED #EDE566
analogous
#66B2ED #666EED #A266ED
triadic
#666EED #ED666E #6EED66
tetradic
#666EED #ED66B2 #EDE566 #66EDA2
square
#666EED #ED66B2 #EDE566 #66EDA2
split-complementary
#666EED #EDA266 #B2ED66
monochromatic
#1721C2 #2F3AE7 #666EED #9DA2F3 #D4D6FA
Accessibility & contrast
On white
4.18
#666EED on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.02
#666EED on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EED
5.02:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EED | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EED | 1.00 | 4.18 | 5.02 | 5.02 |
| #FFFFFF | 4.18 | 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)
#1B82F1
Deuteranopia (green-blind)
#0076EA
Tritanopia (blue-blind)
#0B8BA3
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #666eed; /* rgb */ color: rgb(102, 110, 237); /* oklch */ color: oklch(59.9% 0.188 276.4);
Tailwind
colors: {
custom: {
50: '#9c97f4',
500: '#666eed',
950: '#000000',
},
}SCSS
$custom: #666eed; $custom-light: #9c97f4; $custom-dark: #000000;
JSON
{
"hex": "#666eed",
"rgb": {
"r": 102,
"g": 110,
"b": 237
},
"hsl": {
"h": 236.444,
"s": 78.947,
"l": 66.471
},
"oklch": {
"l": 0.59871,
"c": 0.18816,
"h": 276.4
},
"luminance": 0.20091
}Semantic roles & 50–950 ramp
primary
#666EED
secondary
#EDEBC2
accent
#CF0ADB
background
#FAF9FF
surface
#F4F2FE
border
#CECCD6
text
#0F0D17
muted
#7F7E85