#313E99#313E99

#313E99 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.148 H 272.0°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#313E99
RGB	rgb(49, 62, 153)
HSL	hsl(233, 51%, 40%)
HSV	hsv(233, 68%, 60%)
CMYK	cmyk(68%, 59.5%, 0%, 40%)
CIE-LAB	lab(30.39, 25.68, -51.45)
CIE-LCH	lch(30.39, 57.50, 296.53°)
OKLab	oklab(41% 0.0051 -0.1482)
OKLCH	oklch(41% 0.148 272)
XYZ	xyz(8.7371, 6.3973, 30.9052)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313E99 #998C31

analogous

#317299 #313E99 #583199

triadic

#313E99 #99313E #3E9931

tetradic

#313E99 #993172 #998C31 #319958

square

#313E99 #993172 #998C31 #319958

split-complementary

#313E99 #995831 #729931

monochromatic

#13183C #222B6B #313E99 #4454C3 #727ED2

Accessibility & contrast

On white

9.21

#313E99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#313E99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313E99

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313E99	#FFFFFF	#000000	##FFFFFF
##313E99	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #313e99;
/* rgb */ color: rgb(49, 62, 153);
/* oklch */ color: oklch(41.0% 0.148 272.0);

Tailwind

colors: {
  custom: {
    50: '#7673b8',
    500: '#313e99',
    950: '#000000',
  },
}

SCSS

$custom: #313e99;
$custom-light: #7673b8;
$custom-dark: #000000;

JSON

{
  "hex": "#313e99",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 153
  },
  "hsl": {
    "h": 232.5,
    "s": 51.485,
    "l": 39.608
  },
  "oklch": {
    "l": 0.40998,
    "c": 0.14826,
    "h": 272
  },
  "luminance": 0.06398
}

Semantic roles & 50–950 ramp

primary

#313E99

secondary

#BAB06C

accent

#C94DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #313E99

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

Preview Lab → · Contrast checker → · Palette generator →