#373EA4#373EA4
#373EA4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.162 H 274.2°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).
Color values
| HEX | #373EA4 |
|---|---|
| RGB | rgb(55, 62, 164) |
| HSL | hsl(236, 50%, 43%) |
| HSV | hsv(236, 66%, 64%) |
| CMYK | cmyk(66.5%, 62.2%, 0%, 35.7%) |
| CIE-LAB | lab(31.66, 30.57, -56.03) |
| CIE-LCH | lch(31.66, 63.83, 298.62°) |
| OKLab | oklab(42.32% 0.0117 -0.1615) |
| OKLCH | oklch(42.32% 0.162 274.2) |
| XYZ | xyz(9.9968, 6.9369, 35.9269) |
| Luminance | 0.0694 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.68
Blueberry
#464196
ΔE00 3.43
Ocean Blue
#4F42B5
ΔE00 4.42
Blue Blue
#2242C7
ΔE00 4.96
Darkslateblue
#483D8B
ΔE00 5.32
Cobalt
#0047AB
ΔE00 6.02
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#373EA4 #A49D37
analogous
#3774A4 #373EA4 #6637A4
triadic
#373EA4 #A4373E #3EA437
tetradic
#373EA4 #A43774 #A49D37 #37A466
square
#373EA4 #A43774 #A49D37 #37A466
split-complementary
#373EA4 #A46637 #74A437
monochromatic
#181B48 #282D76 #373EA4 #535AC5 #8186D5
Accessibility & contrast
On white
8.80
#373EA4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.39
#373EA4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #373EA4
8.80:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##373EA4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##373EA4 | 1.00 | 8.80 | 2.39 | 8.80 |
| #FFFFFF | 8.80 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.39 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.80 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FA7
Deuteranopia (green-blind)
#0046A2
Tritanopia (blue-blind)
#00586B
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #373ea4; /* rgb */ color: rgb(55, 62, 164); /* oklch */ color: oklch(42.3% 0.162 274.2);
Tailwind
colors: {
custom: {
50: '#7b73c0',
500: '#373ea4',
950: '#000000',
},
}SCSS
$custom: #373ea4; $custom-light: #7b73c0; $custom-dark: #000000;
JSON
{
"hex": "#373ea4",
"rgb": {
"r": 55,
"g": 62,
"b": 164
},
"hsl": {
"h": 236.147,
"s": 49.772,
"l": 42.941
},
"oklch": {
"l": 0.42317,
"c": 0.16188,
"h": 274.2
},
"luminance": 0.06938
}Semantic roles & 50–950 ramp
primary
#373EA4
secondary
#BEBA79
accent
#D04FD9
background
#F8F7FB
surface
#EFEDF7
border
#CAC8D0
text
#0A0812
muted
#7C7B81