#373DA1#373DA1
#373DA1 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.159 H 274.6°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).
Color values
| HEX | #373DA1 |
|---|---|
| RGB | rgb(55, 61, 161) |
| HSL | hsl(237, 49%, 42%) |
| HSV | hsv(237, 66%, 63%) |
| CMYK | cmyk(65.8%, 62.1%, 0%, 36.9%) |
| CIE-LAB | lab(31.17, 30.16, -55.03) |
| CIE-LCH | lch(31.17, 62.75, 298.73°) |
| OKLab | oklab(41.87% 0.0127 -0.1585) |
| OKLCH | oklch(41.87% 0.159 274.6) |
| XYZ | xyz(9.6752, 6.7221, 34.4989) |
| Luminance | 0.0672 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.75
Blueberry
#464196
ΔE00 3.22
Ocean Blue
#4F42B5
ΔE00 4.71
Darkslateblue
#483D8B
ΔE00 4.96
Blue Blue
#2242C7
ΔE00 5.43
Cobalt
#0047AB
ΔE00 6.27
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#373DA1 #A19B37
analogous
#3772A1 #373DA1 #6637A1
triadic
#373DA1 #A1373D #3DA137
tetradic
#373DA1 #A13772 #A19B37 #37A166
square
#373DA1 #A13772 #A19B37 #37A166
split-complementary
#373DA1 #A16637 #72A137
monochromatic
#181A46 #272C73 #373DA1 #5158C4 #7F84D3
Accessibility & contrast
On white
8.96
#373DA1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.34
#373DA1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #373DA1
8.96:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##373DA1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##373DA1 | 1.00 | 8.96 | 2.34 | 8.96 |
| #FFFFFF | 8.96 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.34 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.96 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004EA4
Deuteranopia (green-blind)
#00459F
Tritanopia (blue-blind)
#005669
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #373da1; /* rgb */ color: rgb(55, 61, 161); /* oklch */ color: oklch(41.9% 0.159 274.6);
Tailwind
colors: {
custom: {
50: '#7b72be',
500: '#373da1',
950: '#000000',
},
}SCSS
$custom: #373da1; $custom-light: #7b72be; $custom-dark: #000000;
JSON
{
"hex": "#373da1",
"rgb": {
"r": 55,
"g": 61,
"b": 161
},
"hsl": {
"h": 236.604,
"s": 49.074,
"l": 42.353
},
"oklch": {
"l": 0.41873,
"c": 0.15905,
"h": 274.6
},
"luminance": 0.06723
}Semantic roles & 50–950 ramp
primary
#373DA1
secondary
#BDB977
accent
#D14FD9
background
#F8F6FB
surface
#EFECF7
border
#CAC7D0
text
#0A0812
muted
#7C7B81