#666EF5#666EF5
#666EF5 is a mid, vivid blue. Relative luminance 0.206; OKLCH L 60.4% C 0.199 H 276.1°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).
Color values
| HEX | #666EF5 |
|---|---|
| RGB | rgb(102, 110, 245) |
| HSL | hsl(237, 88%, 68%) |
| HSV | hsv(237, 58%, 96%) |
| CMYK | cmyk(58.4%, 55.1%, 0%, 3.9%) |
| CIE-LAB | lab(52.47, 35.69, -68.86) |
| CIE-LCH | lch(52.47, 77.56, 297.39°) |
| OKLab | oklab(60.44% 0.0212 -0.1976) |
| OKLCH | oklch(60.44% 0.199 276.1) |
| XYZ | xyz(27.5315, 20.5672, 88.8875) |
| Luminance | 0.2057 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.47
Mediumslateblue
#7B68EE
ΔE00 4.25
Cornflower Blue
#5170D7
ΔE00 5.79
Royal Blue
#4169E1
ΔE00 6.33
Dark Periwinkle
#665FD1
ΔE00 7.12
Lightish Blue
#3D7AFD
ΔE00 7.15
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666EF5 #F5ED66
analogous
#66B6F5 #666EF5 #A566F5
triadic
#666EF5 #F5666E #6EF566
tetradic
#666EF5 #F566B6 #F5ED66 #66F5A5
square
#666EF5 #F566B6 #F5ED66 #66F5A5
split-complementary
#666EF5 #F5A566 #B6F566
monochromatic
#0E19D3 #2D38F1 #666EF5 #9FA4F9 #D9DBFD
Accessibility & contrast
On white
4.11
#666EF5 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.11
#666EF5 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666EF5
5.11:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666EF5 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666EF5 | 1.00 | 4.11 | 5.11 | 5.11 |
| #FFFFFF | 4.11 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.11 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.11 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0083FA
Deuteranopia (green-blind)
#0077F2
Tritanopia (blue-blind)
#008EA7
Achromatopsia (no color)
#7D7D7D
Design tokens & code
CSS
--color: #666ef5; /* rgb */ color: rgb(102, 110, 245); /* oklch */ color: oklch(60.4% 0.199 276.1);
Tailwind
colors: {
custom: {
50: '#9e97f9',
500: '#666ef5',
950: '#000000',
},
}SCSS
$custom: #666ef5; $custom-light: #9e97f9; $custom-dark: #000000;
JSON
{
"hex": "#666ef5",
"rgb": {
"r": 102,
"g": 110,
"b": 245
},
"hsl": {
"h": 236.643,
"s": 87.73,
"l": 68.039
},
"oklch": {
"l": 0.60441,
"c": 0.19871,
"h": 276.1
},
"luminance": 0.20569
}Semantic roles & 50–950 ramp
primary
#666EF5
secondary
#F1EFC6
accent
#D801E4
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D17
muted
#7F7E85