#666FF6#666FF6
#666FF6 is a mid, vivid blue. Relative luminance 0.208; OKLCH L 60.7% C 0.199 H 275.9°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).
Color values
| HEX | #666FF6 |
|---|---|
| RGB | rgb(102, 111, 246) |
| HSL | hsl(236, 89%, 68%) |
| HSV | hsv(236, 59%, 96%) |
| CMYK | cmyk(58.5%, 54.9%, 0%, 3.5%) |
| CIE-LAB | lab(52.78, 35.41, -68.92) |
| CIE-LCH | lch(52.78, 77.49, 297.19°) |
| OKLab | oklab(60.69% 0.0203 -0.1977) |
| OKLCH | oklch(60.69% 0.199 275.9) |
| XYZ | xyz(27.7931, 20.8454, 89.7299) |
| Luminance | 0.2085 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 3.14
Mediumslateblue
#7B68EE
ΔE00 4.46
Cornflower Blue
#5170D7
ΔE00 5.81
Royal Blue
#4169E1
ΔE00 6.44
Lightish Blue
#3D7AFD
ΔE00 6.91
Dark Periwinkle
#665FD1
ΔE00 7.45
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#666FF6 #F6ED66
analogous
#66B7F6 #666FF6 #A566F6
triadic
#666FF6 #F6666F #6FF666
tetradic
#666FF6 #F666B7 #F6ED66 #66F6A5
square
#666FF6 #F666B7 #F6ED66 #66F6A5
split-complementary
#666FF6 #F6A566 #B7F666
monochromatic
#0D19D5 #2C39F3 #666FF6 #A0A5F9 #DADCFD
Accessibility & contrast
On white
4.06
#666FF6 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.17
#666FF6 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #666FF6
5.17:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##666FF6 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##666FF6 | 1.00 | 4.06 | 5.17 | 5.17 |
| #FFFFFF | 4.06 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.17 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.17 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0084FB
Deuteranopia (green-blind)
#0078F3
Tritanopia (blue-blind)
#008FA8
Achromatopsia (no color)
#7E7E7E
Design tokens & code
CSS
--color: #666ff6; /* rgb */ color: rgb(102, 111, 246); /* oklch */ color: oklch(60.7% 0.199 275.9);
Tailwind
colors: {
custom: {
50: '#9e98fa',
500: '#666ff6',
950: '#000000',
},
}SCSS
$custom: #666ff6; $custom-light: #9e98fa; $custom-dark: #000000;
JSON
{
"hex": "#666ff6",
"rgb": {
"r": 102,
"g": 111,
"b": 246
},
"hsl": {
"h": 236.25,
"s": 88.889,
"l": 68.235
},
"oklch": {
"l": 0.60691,
"c": 0.19878,
"h": 275.9
},
"luminance": 0.20847
}Semantic roles & 50–950 ramp
primary
#666FF6
secondary
#F2EFC6
accent
#D700E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D17
muted
#7F7E85