#666FF3#666FF3
#666FF3 is a mid, vivid blue. Relative luminance 0.207; OKLCH L 60.5% C 0.195 H 276.0°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).
Color values
| HEX | #666FF3 |
|---|---|
| RGB | rgb(102, 111, 243) |
| HSL | hsl(236, 85%, 68%) |
| HSV | hsv(236, 58%, 95%) |
| CMYK | cmyk(58%, 54.3%, 0%, 4.7%) |
| CIE-LAB | lab(52.58, 34.45, -67.58) |
| CIE-LCH | lch(52.58, 75.85, 297.01°) |
| OKLab | oklab(60.48% 0.0202 -0.1938) |
| OKLCH | oklch(60.48% 0.195 276) |
| XYZ | xyz(27.3364, 20.6627, 87.3244) |
| Luminance | 0.2067 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.21
Mediumslateblue
#7B68EE
ΔE00 4.43
Cornflower Blue
#5170D7
ΔE00 5.53
Royal Blue
#4169E1
ΔE00 6.23
Lightish Blue
#3D7AFD
ΔE00 6.93
Dark Periwinkle
#665FD1
ΔE00 7.18
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666FF3 #F3EA66
analogous
#66B6F3 #666FF3 #A366F3
triadic
#666FF3 #F3666F #6FF366
tetradic
#666FF3 #F366B6 #F3EA66 #66F3A3
square
#666FF3 #F366B6 #F3EA66 #66F3A3
split-complementary
#666FF3 #F3A366 #B6F366
monochromatic
#101CCE #2D3AEF #666FF3 #9FA4F7 #D7DAFC
Accessibility & contrast
On white
4.09
#666FF3 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.13
#666FF3 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666FF3
5.13:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666FF3 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666FF3 | 1.00 | 4.09 | 5.13 | 5.13 |
| #FFFFFF | 4.09 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.13 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.13 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0D84F8
Deuteranopia (green-blind)
#0078F0
Tritanopia (blue-blind)
#008EA6
Achromatopsia (no color)
#7D7D7D
Design tokens & code
CSS
--color: #666ff3; /* rgb */ color: rgb(102, 111, 243); /* oklch */ color: oklch(60.5% 0.195 276.0);
Tailwind
colors: {
custom: {
50: '#9d98f8',
500: '#666ff3',
950: '#000000',
},
}SCSS
$custom: #666ff3; $custom-light: #9d98f8; $custom-dark: #000000;
JSON
{
"hex": "#666ff3",
"rgb": {
"r": 102,
"g": 111,
"b": 243
},
"hsl": {
"h": 236.17,
"s": 85.455,
"l": 67.647
},
"oklch": {
"l": 0.60477,
"c": 0.19483,
"h": 276
},
"luminance": 0.20665
}Semantic roles & 50–950 ramp
primary
#666FF3
secondary
#F0EDC5
accent
#D404E2
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0D17
muted
#7F7E85