#666DEE#666DEE
#666DEE is a mid, vivid blue. Relative luminance 0.199; OKLCH L 59.8% C 0.191 H 276.6°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #666DEE |
|---|---|
| RGB | rgb(102, 109, 238) |
| HSL | hsl(237, 80%, 67%) |
| HSV | hsv(237, 57%, 93%) |
| CMYK | cmyk(57.1%, 54.2%, 0%, 6.7%) |
| CIE-LAB | lab(51.76, 34.06, -66.11) |
| CIE-LCH | lch(51.76, 74.37, 297.25°) |
| OKLab | oklab(59.76% 0.022 -0.1895) |
| OKLCH | oklch(59.76% 0.191 276.6) |
| XYZ | xyz(26.3758, 19.9332, 83.3299) |
| Luminance | 0.1993 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 4.03
Mediumslateblue
#7B68EE
ΔE00 4.09
Cornflower Blue
#5170D7
ΔE00 5.28
Royal Blue
#4169E1
ΔE00 5.85
Dark Periwinkle
#665FD1
ΔE00 6.23
Bright Blue
#0165FC
ΔE00 7.44
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666DEE #EEE766
analogous
#66B1EE #666DEE #A366EE
triadic
#666DEE #EE666D #6DEE66
tetradic
#666DEE #EE66B1 #EEE766 #66EEA3
square
#666DEE #EE66B1 #EEE766 #66EEA3
split-complementary
#666DEE #EEA366 #B1EE66
monochromatic
#161FC4 #2F38E8 #666DEE #9DA2F4 #D4D6FA
Accessibility & contrast
On white
4.21
#666DEE on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#666DEE on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666DEE
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666DEE | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666DEE | 1.00 | 4.21 | 4.99 | 4.99 |
| #FFFFFF | 4.21 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.99 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.99 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#1281F2
Deuteranopia (green-blind)
#0076EB
Tritanopia (blue-blind)
#078BA3
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #666dee; /* rgb */ color: rgb(102, 109, 238); /* oklch */ color: oklch(59.8% 0.191 276.6);
Tailwind
colors: {
custom: {
50: '#9d96f4',
500: '#666dee',
950: '#000000',
},
}SCSS
$custom: #666dee; $custom-light: #9d96f4; $custom-dark: #000000;
JSON
{
"hex": "#666dee",
"rgb": {
"r": 102,
"g": 109,
"b": 238
},
"hsl": {
"h": 236.912,
"s": 80,
"l": 66.667
},
"oklch": {
"l": 0.59761,
"c": 0.19075,
"h": 276.6
},
"luminance": 0.19935
}Semantic roles & 50–950 ramp
primary
#666DEE
secondary
#EEECC2
accent
#D109DC
background
#FAF9FF
surface
#F4F2FE
border
#CECCD6
text
#0F0D17
muted
#7F7E85