#666EEB#666EEB
#666EEB is a mid, vivid blue. Relative luminance 0.200; OKLCH L 59.7% C 0.185 H 276.5°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).
Color values
| HEX | #666EEB |
|---|---|
| RGB | rgb(102, 110, 235) |
| HSL | hsl(236, 77%, 66%) |
| HSV | hsv(236, 57%, 92%) |
| CMYK | cmyk(56.6%, 53.2%, 0%, 7.8%) |
| CIE-LAB | lab(51.81, 32.50, -64.36) |
| CIE-LCH | lch(51.81, 72.10, 296.79°) |
| OKLab | oklab(59.73% 0.0209 -0.1843) |
| OKLCH | oklch(59.73% 0.186 276.5) |
| XYZ | xyz(26.0460, 19.9729, 81.0638) |
| Luminance | 0.1998 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.89
Mediumslateblue
#7B68EE
ΔE00 4.34
Cornflower Blue
#5170D7
ΔE00 4.93
Royal Blue
#4169E1
ΔE00 5.71
Dark Periwinkle
#665FD1
ΔE00 6.24
Lightish Blue
#3D7AFD
ΔE00 7.32
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EEB #EBE366
analogous
#66B0EB #666EEB #A066EB
triadic
#666EEB #EB666E #6EEB66
tetradic
#666EEB #EB66B0 #EBE366 #66EBA0
square
#666EEB #EB66B0 #EBE366 #66EBA0
split-complementary
#666EEB #EBA066 #B0EB66
monochromatic
#1923BE #303BE4 #666EEB #9CA1F2 #D2D5F9
Accessibility & contrast
On white
4.20
#666EEB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.00
#666EEB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EEB
5.00:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EEB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EEB | 1.00 | 4.20 | 5.00 | 5.00 |
| #FFFFFF | 4.20 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.00 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.00 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2081EF
Deuteranopia (green-blind)
#0076E8
Tritanopia (blue-blind)
#138BA2
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #666eeb; /* rgb */ color: rgb(102, 110, 235); /* oklch */ color: oklch(59.7% 0.185 276.5);
Tailwind
colors: {
custom: {
50: '#9c97f2',
500: '#666eeb',
950: '#000000',
},
}SCSS
$custom: #666eeb; $custom-light: #9c97f2; $custom-dark: #000000;
JSON
{
"hex": "#666eeb",
"rgb": {
"r": 102,
"g": 110,
"b": 235
},
"hsl": {
"h": 236.391,
"s": 76.879,
"l": 66.078
},
"oklch": {
"l": 0.59731,
"c": 0.1855,
"h": 276.5
},
"luminance": 0.19975
}Semantic roles & 50–950 ramp
primary
#666EEB
secondary
#ECEAC1
accent
#CD0CD9
background
#FAF9FE
surface
#F4F2FD
border
#CECCD5
text
#0F0D17
muted
#7F7E85