#666FE7#666FE7
#666FE7 is a mid, vivid blue. Relative luminance 0.200; OKLCH L 59.6% C 0.179 H 276.3°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #666FE7 |
|---|---|
| RGB | rgb(102, 111, 231) |
| HSL | hsl(236, 73%, 65%) |
| HSV | hsv(236, 56%, 91%) |
| CMYK | cmyk(55.8%, 51.9%, 0%, 9.4%) |
| CIE-LAB | lab(51.79, 30.62, -62.14) |
| CIE-LCH | lch(51.79, 69.27, 296.23°) |
| OKLab | oklab(59.64% 0.0196 -0.1778) |
| OKLCH | oklch(59.64% 0.179 276.3) |
| XYZ | xyz(25.5831, 19.9614, 78.0906) |
| Luminance | 0.1996 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.88
Cornflower Blue
#5170D7
ΔE00 4.53
Mediumslateblue
#7B68EE
ΔE00 4.67
Royal Blue
#4169E1
ΔE00 5.57
Dark Periwinkle
#665FD1
ΔE00 6.24
Lightish Blue
#3D7AFD
ΔE00 7.22
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666FE7 #E7DE66
analogous
#66AFE7 #666FE7 #9D66E7
triadic
#666FE7 #E7666F #6FE766
tetradic
#666FE7 #E766AF #E7DE66 #66E79D
square
#666FE7 #E766AF #E7DE66 #66E79D
split-complementary
#666FE7 #E79D66 #AFE766
monochromatic
#1D27B6 #313DDF #666FE7 #9BA1EF #D0D3F8
Accessibility & contrast
On white
4.21
#666FE7 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#666FE7 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666FE7
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666FE7 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666FE7 | 1.00 | 4.21 | 4.99 | 4.99 |
| #FFFFFF | 4.21 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.99 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.99 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2B81EB
Deuteranopia (green-blind)
#0B76E4
Tritanopia (blue-blind)
#1C8AA0
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #666fe7; /* rgb */ color: rgb(102, 111, 231); /* oklch */ color: oklch(59.6% 0.179 276.3);
Tailwind
colors: {
custom: {
50: '#9b98ef',
500: '#666fe7',
950: '#000000',
},
}SCSS
$custom: #666fe7; $custom-light: #9b98ef; $custom-dark: #000000;
JSON
{
"hex": "#666fe7",
"rgb": {
"r": 102,
"g": 111,
"b": 231
},
"hsl": {
"h": 235.814,
"s": 72.881,
"l": 65.294
},
"oklch": {
"l": 0.59639,
"c": 0.17885,
"h": 276.3
},
"luminance": 0.19963
}Semantic roles & 50–950 ramp
primary
#666FE7
secondary
#EAE7BF
accent
#C711D5
background
#FAF9FE
surface
#F4F2FD
border
#CECCD5
text
#0F0D17
muted
#7F7E85