#313A8A#313A8A

#313A8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.132 H 273.7°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#313A8A
RGB	rgb(49, 58, 138)
HSL	hsl(234, 48%, 37%)
HSV	hsv(234, 64%, 54%)
CMYK	cmyk(64.5%, 58%, 0%, 45.9%)
CIE-LAB	lab(28.15, 22.87, -45.88)
CIE-LCH	lch(28.15, 51.26, 296.49°)
OKLab	oklab(38.96% 0.0086 -0.1318)
OKLCH	oklch(38.96% 0.132 273.7)
XYZ	xyz(7.3656, 5.5134, 24.7159)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A8A #8A8131

analogous

#31678A #313A8A #55318A

triadic

#313A8A #8A313A #3A8A31

tetradic

#313A8A #8A3167 #8A8131 #318A55

square

#313A8A #8A3167 #8A8131 #318A55

split-complementary

#313A8A #8A5531 #678A31

monochromatic

#111430 #21275D #313A8A #414DB7 #6B75CA

Accessibility & contrast

On white

9.99

#313A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#313A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A8A

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A8A	#FFFFFF	#000000	##FFFFFF
##313A8A	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003F88

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313a8a;
/* rgb */ color: rgb(49, 58, 138);
/* oklch */ color: oklch(39.0% 0.132 273.7);

Tailwind

colors: {
  custom: {
    50: '#7370ad',
    500: '#313a8a',
    950: '#000000',
  },
}

SCSS

$custom: #313a8a;
$custom-light: #7370ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313a8a",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 233.933,
    "s": 47.594,
    "l": 36.667
  },
  "oklch": {
    "l": 0.38956,
    "c": 0.13213,
    "h": 273.7
  },
  "luminance": 0.05514
}

Semantic roles & 50–950 ramp

primary

#313A8A

secondary

#B2AA65

accent

#CA51D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313A8A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →