#312BB3#312BB3

#312BB3 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.3% C 0.204 H 274.2°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#312BB3
RGB	rgb(49, 43, 179)
HSL	hsl(243, 61%, 44%)
HSV	hsv(243, 76%, 70%)
CMYK	cmyk(72.6%, 76%, 0%, 29.8%)
CIE-LAB	lab(28.47, 46.42, -70.27)
CIE-LCH	lch(28.47, 84.22, 303.45°)
OKLab	oklab(40.34% 0.015 -0.2033)
OKLCH	oklch(40.34% 0.204 274.2)
XYZ	xyz(10.2645, 5.6344, 43.1857)
Luminance	0.0563 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BB3 #ADB32B

analogous

#2B69B3 #312BB3 #752BB3

triadic

#312BB3 #B3312B #2BB331

tetradic

#312BB3 #B32B69 #ADB32B #2BB375

square

#312BB3 #B32B69 #ADB32B #2BB375

split-complementary

#312BB3 #B3752B #69B32B

monochromatic

#161350 #231F82 #312BB3 #4E48D3 #7E79DF

Accessibility & contrast

On white

9.87

#312BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#312BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BB3

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BB3	#FFFFFF	#000000	##FFFFFF
##312BB3	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B7

Deuteranopia (green-blind)

#003DB1

Tritanopia (blue-blind)

#00536D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #312bb3;
/* rgb */ color: rgb(49, 43, 179);
/* oklch */ color: oklch(40.3% 0.204 274.2);

Tailwind

colors: {
  custom: {
    50: '#7e67cb',
    500: '#312bb3',
    950: '#000000',
  },
}

SCSS

$custom: #312bb3;
$custom-light: #7e67cb;
$custom-dark: #000000;

JSON

{
  "hex": "#312bb3",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 179
  },
  "hsl": {
    "h": 242.647,
    "s": 61.261,
    "l": 43.529
  },
  "oklch": {
    "l": 0.40339,
    "c": 0.20381,
    "h": 274.2
  },
  "luminance": 0.05635
}

Semantic roles & 50–950 ramp

primary

#312BB3

secondary

#C3C773

accent

#E443DD

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #312BB3

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

Preview Lab → · Contrast checker → · Palette generator →