#666BFB#666BFB
#666BFB is a mid, highly saturated blue. Relative luminance 0.203; OKLCH L 60.4% C 0.210 H 276.6°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).
Color values
| HEX | #666BFB |
|---|---|
| RGB | rgb(102, 107, 251) |
| HSL | hsl(238, 95%, 69%) |
| HSV | hsv(238, 59%, 98%) |
| CMYK | cmyk(59.4%, 57.4%, 0%, 1.6%) |
| CIE-LAB | lab(52.18, 39.39, -72.68) |
| CIE-LCH | lch(52.18, 82.66, 298.46°) |
| OKLab | oklab(60.35% 0.0241 -0.2088) |
| OKLCH | oklch(60.35% 0.21 276.6) |
| XYZ | xyz(28.1441, 20.3031, 93.6839) |
| Luminance | 0.2031 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Mediumslateblue
#7B68EE
ΔE00 3.90
Cornflower
#6A79F7
ΔE00 4.34
Cornflower Blue
#5170D7
ΔE00 6.62
Royal Blue
#4169E1
ΔE00 6.75
Dark Periwinkle
#665FD1
ΔE00 7.07
Bright Blue
#0165FC
ΔE00 7.59
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666BFB #FBF666
analogous
#66B5FB #666BFB #AC66FB
triadic
#666BFB #FB666B #6BFB66
tetradic
#666BFB #FB66B5 #FBF666 #66FBAC
square
#666BFB #FB66B5 #FBF666 #66FBAC
split-complementary
#666BFB #FBAC66 #B5FB66
monochromatic
#060DE1 #2A31F9 #666BFB #A2A5FD #DDDEFE
Accessibility & contrast
On white
4.15
#666BFB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.06
#666BFB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666BFB
5.06:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666BFB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666BFB | 1.00 | 4.15 | 5.06 | 5.06 |
| #FFFFFF | 4.15 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.06 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.06 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0083FF
Deuteranopia (green-blind)
#0076F8
Tritanopia (blue-blind)
#008EA9
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #666bfb; /* rgb */ color: rgb(102, 107, 251); /* oklch */ color: oklch(60.4% 0.210 276.6);
Tailwind
colors: {
custom: {
50: '#9f95fe',
500: '#666bfb',
950: '#000000',
},
}SCSS
$custom: #666bfb; $custom-light: #9f95fe; $custom-dark: #000000;
JSON
{
"hex": "#666bfb",
"rgb": {
"r": 102,
"g": 107,
"b": 251
},
"hsl": {
"h": 237.987,
"s": 94.904,
"l": 69.216
},
"oklch": {
"l": 0.60353,
"c": 0.21019,
"h": 276.6
},
"luminance": 0.20305
}Semantic roles & 50–950 ramp
primary
#666BFB
secondary
#F4F3C9
accent
#DE00E6
background
#FAF9FF
surface
#F4F1FF
border
#CECBD7
text
#100D18
muted
#7F7E86