#313F89#313F89

#313F89 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.9% C 0.124 H 271.6°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#313F89
RGB	rgb(49, 63, 137)
HSL	hsl(230, 47%, 36%)
HSV	hsv(230, 64%, 54%)
CMYK	cmyk(64.2%, 54%, 0%, 46.3%)
CIE-LAB	lab(29.45, 19.12, -43.17)
CIE-LCH	lch(29.45, 47.21, 293.89°)
OKLab	oklab(39.9% 0.0035 -0.1238)
OKLCH	oklch(39.9% 0.124 271.6)
XYZ	xyz(7.5580, 6.0135, 24.4245)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F89 #897B31

analogous

#316B89 #313F89 #4F3189

triadic

#313F89 #89313F #3F8931

tetradic

#313F89 #89316B #897B31 #31894F

square

#313F89 #89316B #897B31 #31894F

split-complementary

#313F89 #894F31 #6B8931

monochromatic

#11162F #212A5C #313F89 #4154B6 #6B7ACA

Accessibility & contrast

On white

9.53

#313F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#313F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F89

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F89	#FFFFFF	#000000	##FFFFFF
##313F89	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11498C

Deuteranopia (green-blind)

#004287

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313f89;
/* rgb */ color: rgb(49, 63, 137);
/* oklch */ color: oklch(39.9% 0.124 271.6);

Tailwind

colors: {
  custom: {
    50: '#7373ac',
    500: '#313f89',
    950: '#000000',
  },
}

SCSS

$custom: #313f89;
$custom-light: #7373ac;
$custom-dark: #000000;

JSON

{
  "hex": "#313f89",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 230.455,
    "s": 47.312,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39904,
    "c": 0.12384,
    "h": 271.6
  },
  "luminance": 0.06014
}

Semantic roles & 50–950 ramp

primary

#313F89

secondary

#B1A564

accent

#C251D7

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #313F89

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

Preview Lab → · Contrast checker → · Palette generator →