#666DF1#666DF1
#666DF1 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 60.0% C 0.195 H 276.5°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).
Color values
| HEX | #666DF1 |
|---|---|
| RGB | rgb(102, 109, 241) |
| HSL | hsl(237, 83%, 67%) |
| HSV | hsv(237, 58%, 95%) |
| CMYK | cmyk(57.7%, 54.8%, 0%, 5.5%) |
| CIE-LAB | lab(51.96, 35.01, -67.46) |
| CIE-LCH | lch(51.96, 76.00, 297.43°) |
| OKLab | oklab(59.98% 0.0221 -0.1934) |
| OKLCH | oklch(59.98% 0.195 276.5) |
| XYZ | xyz(26.8202, 20.1110, 85.6705) |
| Luminance | 0.2011 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.90
Mediumslateblue
#7B68EE
ΔE00 4.05
Cornflower Blue
#5170D7
ΔE00 5.52
Royal Blue
#4169E1
ΔE00 6.03
Dark Periwinkle
#665FD1
ΔE00 6.50
Lightish Blue
#3D7AFD
ΔE00 7.43
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666DF1 #F1EA66
analogous
#66B3F1 #666DF1 #A466F1
triadic
#666DF1 #F1666D #6DF166
tetradic
#666DF1 #F166B3 #F1EA66 #66F1A4
square
#666DF1 #F166B3 #F1EA66 #66F1A4
split-complementary
#666DF1 #F1A466 #B3F166
monochromatic
#121CCA #2E37EC #666DF1 #9EA3F6 #D6D8FB
Accessibility & contrast
On white
4.18
#666DF1 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.02
#666DF1 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666DF1
5.02:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666DF1 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666DF1 | 1.00 | 4.18 | 5.02 | 5.02 |
| #FFFFFF | 4.18 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.02 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.02 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0382F6
Deuteranopia (green-blind)
#0076EE
Tritanopia (blue-blind)
#008CA4
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #666df1; /* rgb */ color: rgb(102, 109, 241); /* oklch */ color: oklch(60.0% 0.195 276.5);
Tailwind
colors: {
custom: {
50: '#9d96f6',
500: '#666df1',
950: '#000000',
},
}SCSS
$custom: #666df1; $custom-light: #9d96f6; $custom-dark: #000000;
JSON
{
"hex": "#666df1",
"rgb": {
"r": 102,
"g": 109,
"b": 241
},
"hsl": {
"h": 236.978,
"s": 83.234,
"l": 67.255
},
"oklch": {
"l": 0.59975,
"c": 0.19471,
"h": 276.5
},
"luminance": 0.20113
}Semantic roles & 50–950 ramp
primary
#666DF1
secondary
#EFEDC3
accent
#D506E0
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0D17
muted
#7F7E85