#666AEA#666AEA
#666AEA is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.9% C 0.189 H 277.5°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).
Color values
| HEX | #666AEA |
|---|---|
| RGB | rgb(102, 106, 234) |
| HSL | hsl(238, 76%, 66%) |
| HSV | hsv(238, 56%, 92%) |
| CMYK | cmyk(56.4%, 54.7%, 0%, 8.2%) |
| CIE-LAB | lab(50.77, 34.59, -65.47) |
| CIE-LCH | lch(50.77, 74.05, 297.85°) |
| OKLab | oklab(58.94% 0.0248 -0.1876) |
| OKLCH | oklch(58.94% 0.189 277.5) |
| XYZ | xyz(25.4801, 19.0716, 80.1644) |
| Luminance | 0.1907 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Mediumslateblue
#7B68EE
ΔE00 3.78
Dark Periwinkle
#665FD1
ΔE00 5.11
Cornflower
#6A79F7
ΔE00 5.15
Cornflower Blue
#5170D7
ΔE00 5.42
Royal Blue
#4169E1
ΔE00 5.69
Light Indigo
#6D5ACF
ΔE00 6.75
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666AEA #EAE666
analogous
#66ACEA #666AEA #A466EA
triadic
#666AEA #EA666A #6AEA66
tetradic
#666AEA #EA66AC #EAE666 #66EAA4
square
#666AEA #EA66AC #EAE666 #66EAA4
split-complementary
#666AEA #EAA466 #ACEA66
monochromatic
#1A1FBC #3036E3 #666AEA #9C9EF1 #D2D3F9
Accessibility & contrast
On white
4.36
#666AEA on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.81
#666AEA on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666AEA
4.81:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666AEA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666AEA | 1.00 | 4.36 | 4.81 | 4.81 |
| #FFFFFF | 4.36 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.81 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.81 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0B7EEE
Deuteranopia (green-blind)
#0074E7
Tritanopia (blue-blind)
#1788A0
Achromatopsia (no color)
#797979
Design tokens & code
CSS
--color: #666aea; /* rgb */ color: rgb(102, 106, 234); /* oklch */ color: oklch(58.9% 0.189 277.5);
Tailwind
colors: {
custom: {
50: '#9c94f1',
500: '#666aea',
950: '#000000',
},
}SCSS
$custom: #666aea; $custom-light: #9c94f1; $custom-dark: #000000;
JSON
{
"hex": "#666aea",
"rgb": {
"r": 102,
"g": 106,
"b": 234
},
"hsl": {
"h": 238.182,
"s": 75.862,
"l": 65.882
},
"oklch": {
"l": 0.58936,
"c": 0.18926,
"h": 277.5
},
"luminance": 0.19073
}Semantic roles & 50–950 ramp
primary
#666AEA
secondary
#ECEAC0
accent
#D20DD8
background
#FAF9FE
surface
#F4F1FD
border
#CECBD5
text
#0F0D17
muted
#7F7E85