#312F91#312F91

#312F91 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.5% C 0.156 H 276.7°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#312F91
RGB	rgb(49, 47, 145)
HSL	hsl(241, 51%, 38%)
HSV	hsv(241, 68%, 57%)
CMYK	cmyk(66.2%, 67.6%, 0%, 43.1%)
CIE-LAB	lab(25.95, 32.61, -53.80)
CIE-LCH	lch(25.95, 62.91, 301.22°)
OKLab	oklab(37.52% 0.0181 -0.1552)
OKLCH	oklch(37.52% 0.156 276.7)
XYZ	xyz(7.3923, 4.7297, 27.3059)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312F91 #8F912F

analogous

#2F5E91 #312F91 #622F91

triadic

#312F91 #91312F #2F9131

tetradic

#312F91 #912F5E #8F912F #2F9162

square

#312F91 #912F5E #8F912F #2F9162

split-complementary

#312F91 #91622F #5E912F

monochromatic

#121135 #212063 #312F91 #413EBF #6D6BCF

Accessibility & contrast

On white

10.79

#312F91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#312F91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312F91

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312F91	#FFFFFF	#000000	##FFFFFF
##312F91	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004294

Deuteranopia (green-blind)

#00398F

Tritanopia (blue-blind)

#00495C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #312f91;
/* rgb */ color: rgb(49, 47, 145);
/* oklch */ color: oklch(37.5% 0.156 276.7);

Tailwind

colors: {
  custom: {
    50: '#7668b2',
    500: '#312f91',
    950: '#000000',
  },
}

SCSS

$custom: #312f91;
$custom-light: #7668b2;
$custom-dark: #000000;

JSON

{
  "hex": "#312f91",
  "rgb": {
    "r": 49,
    "g": 47,
    "b": 145
  },
  "hsl": {
    "h": 241.224,
    "s": 51.042,
    "l": 37.647
  },
  "oklch": {
    "l": 0.3752,
    "c": 0.15623,
    "h": 276.7
  },
  "luminance": 0.0473
}

Semantic roles & 50–950 ramp

primary

#312F91

secondary

#B5B665

accent

#DB4DD8

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #312F91

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

Preview Lab → · Contrast checker → · Palette generator →