#373FA9#373FA9
#373FA9 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.9% C 0.167 H 273.7°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).
Color values
| HEX | #373FA9 |
|---|---|
| RGB | rgb(55, 63, 169) |
| HSL | hsl(236, 51%, 44%) |
| HSV | hsv(236, 67%, 66%) |
| CMYK | cmyk(67.5%, 62.7%, 0%, 33.7%) |
| CIE-LAB | lab(32.33, 31.70, -57.94) |
| CIE-LCH | lch(32.33, 66.05, 298.68°) |
| OKLab | oklab(42.94% 0.0107 -0.1671) |
| OKLCH | oklch(42.94% 0.167 273.7) |
| XYZ | xyz(10.5121, 7.2309, 38.3701) |
| Luminance | 0.0723 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.66
Blueberry
#464196
ΔE00 3.90
Ocean Blue
#4F42B5
ΔE00 3.99
Blue Blue
#2242C7
ΔE00 4.24
Cobalt
#0047AB
ΔE00 5.83
Darkslateblue
#483D8B
ΔE00 5.90
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#373FA9 #A9A137
analogous
#3778A9 #373FA9 #6837A9
triadic
#373FA9 #A9373F #3FA937
tetradic
#373FA9 #A93778 #A9A137 #37A968
square
#373FA9 #A93778 #A9A137 #37A968
split-complementary
#373FA9 #A96837 #78A937
monochromatic
#191D4D #282E7B #373FA9 #555DC8 #8489D7
Accessibility & contrast
On white
8.58
#373FA9 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.45
#373FA9 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #373FA9
8.58:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##373FA9 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##373FA9 | 1.00 | 8.58 | 2.45 | 8.58 |
| #FFFFFF | 8.58 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.45 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.58 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0051AC
Deuteranopia (green-blind)
#0047A7
Tritanopia (blue-blind)
#005A6E
Achromatopsia (no color)
#4C4C4C
Design tokens & code
CSS
--color: #373fa9; /* rgb */ color: rgb(55, 63, 169); /* oklch */ color: oklch(42.9% 0.167 273.7);
Tailwind
colors: {
custom: {
50: '#7c74c3',
500: '#373fa9',
950: '#000000',
},
}SCSS
$custom: #373fa9; $custom-light: #7c74c3; $custom-dark: #000000;
JSON
{
"hex": "#373fa9",
"rgb": {
"r": 55,
"g": 63,
"b": 169
},
"hsl": {
"h": 235.789,
"s": 50.893,
"l": 43.922
},
"oklch": {
"l": 0.42935,
"c": 0.16743,
"h": 273.7
},
"luminance": 0.07232
}Semantic roles & 50–950 ramp
primary
#373FA9
secondary
#C0BC7B
accent
#D04DDA
background
#F8F7FC
surface
#EFEDF8
border
#CAC8D1
text
#0B0813
muted
#7C7B82