#312F87#312F87

#312F87 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.6% C 0.143 H 277.7°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#312F87
RGB	rgb(49, 47, 135)
HSL	hsl(241, 48%, 36%)
HSV	hsv(241, 65%, 53%)
CMYK	cmyk(63.7%, 65.2%, 0%, 47.1%)
CIE-LAB	lab(25.06, 29.10, -49.04)
CIE-LCH	lch(25.06, 57.03, 300.68°)
OKLab	oklab(36.6% 0.0191 -0.1412)
OKLCH	oklch(36.6% 0.143 277.7)
XYZ	xyz(6.6549, 4.4348, 23.4223)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312F87 #85872F

analogous

#2F5987 #312F87 #5D2F87

triadic

#312F87 #87312F #2F8731

tetradic

#312F87 #872F59 #85872F #2F875D

square

#312F87 #872F59 #85872F #2F875D

split-complementary

#312F87 #875D2F #59872F

monochromatic

#100F2C #211F5A #312F87 #413FB4 #6966CA

Accessibility & contrast

On white

11.13

#312F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#312F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312F87

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312F87	#FFFFFF	#000000	##FFFFFF
##312F87	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8A

Deuteranopia (green-blind)

#003885

Tritanopia (blue-blind)

#004556

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #312f87;
/* rgb */ color: rgb(49, 47, 135);
/* oklch */ color: oklch(36.6% 0.143 277.7);

Tailwind

colors: {
  custom: {
    50: '#7368ab',
    500: '#312f87',
    950: '#000000',
  },
}

SCSS

$custom: #312f87;
$custom-light: #7368ab;
$custom-dark: #000000;

JSON

{
  "hex": "#312f87",
  "rgb": {
    "r": 49,
    "g": 47,
    "b": 135
  },
  "hsl": {
    "h": 241.364,
    "s": 48.352,
    "l": 35.686
  },
  "oklch": {
    "l": 0.36596,
    "c": 0.14252,
    "h": 277.7
  },
  "luminance": 0.04435
}

Semantic roles & 50–950 ramp

primary

#312F87

secondary

#AFB161

accent

#D850D5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #312F87

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

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