#313FA9#313FA9
#313FA9 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.169 H 271.4°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).
Color values
| HEX | #313FA9 |
|---|---|
| RGB | rgb(49, 63, 169) |
| HSL | hsl(233, 55%, 43%) |
| HSV | hsv(233, 71%, 66%) |
| CMYK | cmyk(71%, 62.7%, 0%, 33.7%) |
| CIE-LAB | lab(31.97, 30.87, -58.54) |
| CIE-LCH | lch(31.97, 66.18, 297.80°) |
| OKLab | oklab(42.58% 0.0041 -0.169) |
| OKLCH | oklch(42.58% 0.169 271.4) |
| XYZ | xyz(10.2031, 7.0715, 38.3557) |
| Luminance | 0.0707 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.26
Blue Blue
#2242C7
ΔE00 4.06
Blueberry
#464196
ΔE00 4.39
Ocean Blue
#4F42B5
ΔE00 4.69
Cobalt
#0047AB
ΔE00 5.14
Darkslateblue
#483D8B
ΔE00 6.36
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#313FA9 #A99B31
analogous
#317BA9 #313FA9 #5F31A9
triadic
#313FA9 #A9313F #3FA931
tetradic
#313FA9 #A9317B #A99B31 #31A95F
square
#313FA9 #A9317B #A99B31 #31A95F
split-complementary
#313FA9 #A95F31 #7BA931
monochromatic
#151C4A #232D7A #313FA9 #4C5BCB #7C86D9
Accessibility & contrast
On white
8.70
#313FA9 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.41
#313FA9 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #313FA9
8.70:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##313FA9 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##313FA9 | 1.00 | 8.70 | 2.41 | 8.70 |
| #FFFFFF | 8.70 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.41 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.70 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0051AC
Deuteranopia (green-blind)
#0046A7
Tritanopia (blue-blind)
#005A6E
Achromatopsia (no color)
#4B4B4B
Design tokens & code
CSS
--color: #313fa9; /* rgb */ color: rgb(49, 63, 169); /* oklch */ color: oklch(42.6% 0.169 271.4);
Tailwind
colors: {
custom: {
50: '#7a74c3',
500: '#313fa9',
950: '#000000',
},
}SCSS
$custom: #313fa9; $custom-light: #7a74c3; $custom-dark: #000000;
JSON
{
"hex": "#313fa9",
"rgb": {
"r": 49,
"g": 63,
"b": 169
},
"hsl": {
"h": 233,
"s": 55.046,
"l": 42.745
},
"oklch": {
"l": 0.42576,
"c": 0.16905,
"h": 271.4
},
"luminance": 0.07073
}Semantic roles & 50–950 ramp
primary
#313FA9
secondary
#C1B874
accent
#CD49DE
background
#F8F7FC
surface
#EFEDF8
border
#CAC8D1
text
#0A0813
muted
#7C7B82