#312B71#312B71

#312B71 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.9% C 0.117 H 282.1°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#312B71
RGB	rgb(49, 43, 113)
HSL	hsl(245, 45%, 31%)
HSV	hsv(245, 62%, 44%)
CMYK	cmyk(56.6%, 61.9%, 0%, 55.7%)
CIE-LAB	lab(22.21, 24.04, -39.76)
CIE-LCH	lch(22.21, 46.46, 301.16°)
OKLab	oklab(33.92% 0.0244 -0.114)
OKLCH	oklch(33.92% 0.117 282.1)
XYZ	xyz(5.1102, 3.5727, 16.0399)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312B71 #6B712B

analogous

#2B4871 #312B71 #542B71

triadic

#312B71 #71312B #2B7131

tetradic

#312B71 #712B48 #6B712B #2B7154

square

#312B71 #712B48 #6B712B #2B7154

split-complementary

#312B71 #71542B #48712B

monochromatic

#0B0918 #1E1A45 #312B71 #443C9D #6057BF

Accessibility & contrast

On white

12.25

#312B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#312B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312B71

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312B71	#FFFFFF	#000000	##FFFFFF
##312B71	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003873

Deuteranopia (green-blind)

#003370

Tritanopia (blue-blind)

#143B49

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #312b71;
/* rgb */ color: rgb(49, 43, 113);
/* oklch */ color: oklch(33.9% 0.117 282.1);

Tailwind

colors: {
  custom: {
    50: '#70649a',
    500: '#312b71',
    950: '#000000',
  },
}

SCSS

$custom: #312b71;
$custom-light: #70649a;
$custom-dark: #000000;

JSON

{
  "hex": "#312b71",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 113
  },
  "hsl": {
    "h": 245.143,
    "s": 44.872,
    "l": 30.588
  },
  "oklch": {
    "l": 0.33924,
    "c": 0.11654,
    "h": 282.1
  },
  "luminance": 0.03573
}

Semantic roles & 50–950 ramp

primary

#312B71

secondary

#9CA355

accent

#D553C9

background

#F7F6F9

surface

#EDEBF2

border

#C8C6CC

text

#08050E

muted

#7B7A7E

Preview Lab

Preview with #312B71

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

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