#313DA8#313DA8
#313DA8 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.170 H 271.9°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).
Color values
| HEX | #313DA8 |
|---|---|
| RGB | rgb(49, 61, 168) |
| HSL | hsl(234, 55%, 43%) |
| HSV | hsv(234, 71%, 66%) |
| CMYK | cmyk(70.8%, 63.7%, 0%, 34.1%) |
| CIE-LAB | lab(31.39, 31.80, -58.90) |
| CIE-LCH | lch(31.39, 66.93, 298.37°) |
| OKLab | oklab(42.12% 0.0056 -0.17) |
| OKLCH | oklch(42.12% 0.17 271.9) |
| XYZ | xyz(10.0009, 6.8166, 37.8269) |
| Luminance | 0.0682 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 1.87
Blue Blue
#2242C7
ΔE00 4.34
Blueberry
#464196
ΔE00 4.35
Ocean Blue
#4F42B5
ΔE00 4.72
Cobalt
#0047AB
ΔE00 5.62
Darkslateblue
#483D8B
ΔE00 6.18
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#313DA8 #A89C31
analogous
#3178A8 #313DA8 #6131A8
triadic
#313DA8 #A8313D #3DA831
tetradic
#313DA8 #A83178 #A89C31 #31A861
square
#313DA8 #A83178 #A89C31 #31A861
split-complementary
#313DA8 #A86131 #78A831
monochromatic
#151B49 #232C79 #313DA8 #4C58CB #7B84D8
Accessibility & contrast
On white
8.88
#313DA8 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.36
#313DA8 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #313DA8
8.88:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##313DA8 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##313DA8 | 1.00 | 8.88 | 2.36 | 8.88 |
| #FFFFFF | 8.88 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.36 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.88 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FAB
Deuteranopia (green-blind)
#0044A6
Tritanopia (blue-blind)
#00596C
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #313da8; /* rgb */ color: rgb(49, 61, 168); /* oklch */ color: oklch(42.1% 0.170 271.9);
Tailwind
colors: {
custom: {
50: '#7972c3',
500: '#313da8',
950: '#000000',
},
}SCSS
$custom: #313da8; $custom-light: #7972c3; $custom-dark: #000000;
JSON
{
"hex": "#313da8",
"rgb": {
"r": 49,
"g": 61,
"b": 168
},
"hsl": {
"h": 233.95,
"s": 54.839,
"l": 42.549
},
"oklch": {
"l": 0.4212,
"c": 0.17014,
"h": 271.9
},
"luminance": 0.06818
}Semantic roles & 50–950 ramp
primary
#313DA8
secondary
#C1B974
accent
#CF4ADE
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0A0813
muted
#7C7B82