#666DD7#666DD7
#666DD7 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.2% C 0.160 H 277.4°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).
Color values
| HEX | #666DD7 |
|---|---|
| RGB | rgb(102, 109, 215) |
| HSL | hsl(236, 59%, 62%) |
| HSV | hsv(236, 53%, 84%) |
| CMYK | cmyk(52.6%, 49.3%, 0%, 15.7%) |
| CIE-LAB | lab(50.30, 26.77, -55.52) |
| CIE-LCH | lch(50.30, 61.64, 295.74°) |
| OKLab | oklab(58.19% 0.0205 -0.1583) |
| OKLCH | oklch(58.19% 0.16 277.4) |
| XYZ | xyz(23.2100, 18.6669, 66.6568) |
| Luminance | 0.1867 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 4.15
Dark Periwinkle
#665FD1
ΔE00 4.81
Royal Blue
#4169E1
ΔE00 5.38
Mediumslateblue
#7B68EE
ΔE00 5.43
Cornflower
#6A79F7
ΔE00 5.86
Slate Blue
#6A5ACD
ΔE00 6.66
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666DD7 #D7D066
analogous
#66A6D7 #666DD7 #9866D7
triadic
#666DD7 #D7666D #6DD766
tetradic
#666DD7 #D766A6 #D7D066 #66D798
square
#666DD7 #D766A6 #D7D066 #66D798
split-complementary
#666DD7 #D79866 #A6D766
monochromatic
#282F9A #353FCA #666DD7 #979BE4 #C7CAF0
Accessibility & contrast
On white
4.44
#666DD7 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.73
#666DD7 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666DD7
4.73:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666DD7 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666DD7 | 1.00 | 4.44 | 4.73 | 4.73 |
| #FFFFFF | 4.44 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.73 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.73 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#3A7CDB
Deuteranopia (green-blind)
#2C73D5
Tritanopia (blue-blind)
#338498
Achromatopsia (no color)
#787878
Design tokens & code
CSS
--color: #666dd7; /* rgb */ color: rgb(102, 109, 215); /* oklch */ color: oklch(58.2% 0.160 277.4);
Tailwind
colors: {
custom: {
50: '#9996e4',
500: '#666dd7',
950: '#000000',
},
}SCSS
$custom: #666dd7; $custom-light: #9996e4; $custom-dark: #000000;
JSON
{
"hex": "#666dd7",
"rgb": {
"r": 102,
"g": 109,
"b": 215
},
"hsl": {
"h": 236.283,
"s": 58.549,
"l": 62.157
},
"oklch": {
"l": 0.58191,
"c": 0.15964,
"h": 277.4
},
"luminance": 0.18668
}Semantic roles & 50–950 ramp
primary
#666DD7
secondary
#E1DFB8
accent
#BC1FC6
background
#F9F9FE
surface
#F2F2FC
border
#CCCCD5
text
#0F0D16
muted
#7E7E84