#6366EB#6366EB
#6366EB is a mid, vivid blue. Relative luminance 0.182; OKLCH L 58.1% C 0.196 H 277.4°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).
Color values
| HEX | #6366EB |
|---|---|
| RGB | rgb(99, 102, 235) |
| HSL | hsl(239, 77%, 65%) |
| HSV | hsv(239, 58%, 92%) |
| CMYK | cmyk(57.9%, 56.6%, 0%, 7.8%) |
| CIE-LAB | lab(49.68, 36.78, -67.81) |
| CIE-LCH | lch(49.68, 77.14, 298.47°) |
| OKLab | oklab(58.09% 0.0253 -0.1946) |
| OKLCH | oklch(58.09% 0.196 277.4) |
| XYZ | xyz(24.8876, 18.1517, 80.7733) |
| Luminance | 0.1815 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Mediumslateblue
#7B68EE
ΔE00 4.05
Dark Periwinkle
#665FD1
ΔE00 4.38
Royal Blue
#4169E1
ΔE00 5.57
Cornflower Blue
#5170D7
ΔE00 5.89
Light Indigo
#6D5ACF
ΔE00 5.95
Slate Blue
#6A5ACD
ΔE00 6.00
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#6366EB #EBE863
analogous
#63AAEB #6366EB #A463EB
triadic
#6366EB #EB6366 #66EB63
tetradic
#6366EB #EB63AA #EBE863 #63EBA4
square
#6366EB #EB63AA #EBE863 #63EBA4
split-complementary
#6366EB #EBA463 #AAEB63
monochromatic
#181CBC #2D31E4 #6366EB #999BF2 #CFD0F9
Accessibility & contrast
On white
4.53
#6366EB on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.63
#6366EB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #6366EB
4.63:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##6366EB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##6366EB | 1.00 | 4.53 | 4.63 | 4.63 |
| #FFFFFF | 4.53 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.63 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.63 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#007CEF
Deuteranopia (green-blind)
#0071E8
Tritanopia (blue-blind)
#00869F
Achromatopsia (no color)
#767676
Design tokens & code
CSS
--color: #6366eb; /* rgb */ color: rgb(99, 102, 235); /* oklch */ color: oklch(58.1% 0.196 277.4);
Tailwind
colors: {
custom: {
50: '#9b91f2',
500: '#6366eb',
950: '#000000',
},
}SCSS
$custom: #6366eb; $custom-light: #9b91f2; $custom-dark: #000000;
JSON
{
"hex": "#6366eb",
"rgb": {
"r": 99,
"g": 102,
"b": 235
},
"hsl": {
"h": 238.676,
"s": 77.273,
"l": 65.49
},
"oklch": {
"l": 0.58094,
"c": 0.19625,
"h": 277.4
},
"luminance": 0.18154
}Semantic roles & 50–950 ramp
primary
#6366EB
secondary
#ECEBBE
accent
#D50CDA
background
#FAF8FE
surface
#F4F0FD
border
#CECBD5
text
#0F0D17
muted
#7F7D85