#37517B#37517B
#37517B is a dark, moderate blue. Relative luminance 0.081; OKLCH L 43.4% C 0.077 H 259.6°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).
Color values
| HEX | #37517B |
|---|---|
| RGB | rgb(55, 81, 123) |
| HSL | hsl(217, 38%, 35%) |
| HSV | hsv(217, 55%, 48%) |
| CMYK | cmyk(55.3%, 34.1%, 0%, 51.8%) |
| CIE-LAB | lab(34.24, 3.39, -26.83) |
| CIE-LCH | lch(34.24, 27.04, 277.19°) |
| OKLab | oklab(43.41% -0.0138 -0.0756) |
| OKLCH | oklch(43.41% 0.077 259.6) |
| XYZ | xyz(8.0919, 8.1265, 19.8772) |
| Luminance | 0.0813 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dusk Blue
#26538D
ΔE00 3.79
Denim Blue
#3B5B92
ΔE00 4.38
Light Navy Blue
#2E5A88
ΔE00 4.65
Cobalt (survey)
#1E488F
ΔE00 4.85
Light Navy
#155084
ΔE00 4.97
Dusky Blue
#475F94
ΔE00 5.71
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#37517B #7B6137
analogous
#37737B #37517B #3F377B
triadic
#37517B #7B3751 #517B37
tetradic
#37517B #7B3773 #7B6137 #377B3F
square
#37517B #7B3773 #7B6137 #377B3F
split-complementary
#37517B #7B3F37 #737B37
monochromatic
#111926 #243551 #37517B #4A6DA5 #6E8DBE
Accessibility & contrast
On white
8.00
#37517B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.63
#37517B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #37517B
8.00:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##37517B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##37517B | 1.00 | 8.00 | 2.63 | 8.00 |
| #FFFFFF | 8.00 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.00 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#40547D
Deuteranopia (green-blind)
#384E7A
Tritanopia (blue-blind)
#125A60
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #37517b; /* rgb */ color: rgb(55, 81, 123); /* oklch */ color: oklch(43.4% 0.077 259.6);
Tailwind
colors: {
custom: {
50: '#7381a1',
500: '#37517b',
950: '#000000',
},
}SCSS
$custom: #37517b; $custom-light: #7381a1; $custom-dark: #000000;
JSON
{
"hex": "#37517b",
"rgb": {
"r": 55,
"g": 81,
"b": 123
},
"hsl": {
"h": 217.059,
"s": 38.202,
"l": 34.902
},
"oklch": {
"l": 0.43405,
"c": 0.07683,
"h": 259.6
},
"luminance": 0.08127
}Semantic roles & 50–950 ramp
primary
#37517B
secondary
#A78E67
accent
#A25ACE
background
#F7F7F9
surface
#EDEEF2
border
#C8C9CC
text
#080A0F
muted
#7B7C7E