#31508B#31508B
#31508B is a dark, moderate blue. Relative luminance 0.083; OKLCH L 43.8% C 0.104 H 262.1°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).
Color values
| HEX | #31508B |
|---|---|
| RGB | rgb(49, 80, 139) |
| HSL | hsl(219, 48%, 37%) |
| HSV | hsv(219, 65%, 55%) |
| CMYK | cmyk(64.7%, 42.4%, 0%, 45.5%) |
| CIE-LAB | lab(34.51, 8.45, -36.28) |
| CIE-LCH | lch(34.51, 37.25, 283.11°) |
| OKLab | oklab(43.81% -0.0144 -0.1033) |
| OKLCH | oklch(43.81% 0.104 262.1) |
| XYZ | xyz(8.7939, 8.2536, 25.5508) |
| Luminance | 0.0825 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dusk Blue
#26538D
ΔE00 2.54
Cobalt (survey)
#1E488F
ΔE00 3.00
Denim Blue
#3B5B92
ΔE00 3.67
Light Navy
#155084
ΔE00 4.59
Light Navy Blue
#2E5A88
ΔE00 4.60
Dusky Blue
#475F94
ΔE00 5.44
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#31508B #8B6C31
analogous
#317D8B #31508B #3F318B
triadic
#31508B #8B3150 #508B31
tetradic
#31508B #8B317D #8B6C31 #318B3F
square
#31508B #8B317D #8B6C31 #318B3F
split-complementary
#31508B #8B3F31 #7D8B31
monochromatic
#111C31 #21365E #31508B #416AB8 #6B8CCB
Accessibility & contrast
On white
7.92
#31508B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.65
#31508B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #31508B
7.92:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##31508B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##31508B | 1.00 | 7.92 | 2.65 | 7.92 |
| #FFFFFF | 7.92 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.65 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.92 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#35568D
Deuteranopia (green-blind)
#284D8A
Tritanopia (blue-blind)
#005D66
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #31508b; /* rgb */ color: rgb(49, 80, 139); /* oklch */ color: oklch(43.8% 0.104 262.1);
Tailwind
colors: {
custom: {
50: '#7280ad',
500: '#31508b',
950: '#000000',
},
}SCSS
$custom: #31508b; $custom-light: #7280ad; $custom-dark: #000000;
JSON
{
"hex": "#31508b",
"rgb": {
"r": 49,
"g": 80,
"b": 139
},
"hsl": {
"h": 219.333,
"s": 47.872,
"l": 36.863
},
"oklch": {
"l": 0.43809,
"c": 0.10433,
"h": 262.1
},
"luminance": 0.08254
}Semantic roles & 50–950 ramp
primary
#31508B
secondary
#B29865
accent
#A950D7
background
#F7F7FA
surface
#EDEEF4
border
#C8C9CE
text
#090A10
muted
#7B7C7F