#313B89#313B89

#313B89 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.129 H 273.3°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#313B89
RGB	rgb(49, 59, 137)
HSL	hsl(233, 47%, 36%)
HSV	hsv(233, 64%, 54%)
CMYK	cmyk(64.2%, 56.9%, 0%, 46.3%)
CIE-LAB	lab(28.34, 21.83, -44.95)
CIE-LCH	lch(28.34, 49.97, 295.90°)
OKLab	oklab(39.08% 0.0076 -0.1291)
OKLCH	oklch(39.08% 0.129 273.3)
XYZ	xyz(7.3444, 5.5864, 24.3533)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B89 #897F31

analogous

#316789 #313B89 #533189

triadic

#313B89 #89313B #3B8931

tetradic

#313B89 #893167 #897F31 #318953

square

#313B89 #893167 #897F31 #318953

split-complementary

#313B89 #895331 #678931

monochromatic

#11142F #21285C #313B89 #414EB6 #6B75CA

Accessibility & contrast

On white

9.92

#313B89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#313B89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B89

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B89	#FFFFFF	#000000	##FFFFFF
##313B89	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003F87

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313b89;
/* rgb */ color: rgb(49, 59, 137);
/* oklch */ color: oklch(39.1% 0.129 273.3);

Tailwind

colors: {
  custom: {
    50: '#7370ac',
    500: '#313b89',
    950: '#000000',
  },
}

SCSS

$custom: #313b89;
$custom-light: #7370ac;
$custom-dark: #000000;

JSON

{
  "hex": "#313b89",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 137
  },
  "hsl": {
    "h": 233.182,
    "s": 47.312,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39076,
    "c": 0.12931,
    "h": 273.3
  },
  "luminance": 0.05587
}

Semantic roles & 50–950 ramp

primary

#313B89

secondary

#B1A964

accent

#C851D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B89

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

Preview Lab → · Contrast checker → · Palette generator →