#312BA9#312BA9

#312BA9 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 39.3% C 0.192 H 275.1°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#312BA9
RGB	rgb(49, 43, 169)
HSL	hsl(243, 59%, 42%)
HSV	hsv(243, 75%, 66%)
CMYK	cmyk(71%, 74.6%, 0%, 33.7%)
CIE-LAB	lab(27.42, 43.16, -66.01)
CIE-LCH	lch(27.42, 78.87, 303.18°)
OKLab	oklab(39.28% 0.017 -0.1909)
OKLCH	oklch(39.28% 0.192 275.1)
XYZ	xyz(9.2896, 5.2444, 38.0511)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BA9 #A3A92B

analogous

#2B64A9 #312BA9 #702BA9

triadic

#312BA9 #A9312B #2BA931

tetradic

#312BA9 #A92B64 #A3A92B #2BA970

square

#312BA9 #A92B64 #A3A92B #2BA970

split-complementary

#312BA9 #A9702B #64A92B

monochromatic

#151247 #231F78 #312BA9 #4942CF #7873DB

Accessibility & contrast

On white

10.25

#312BA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#312BA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BA9

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BA9	#FFFFFF	#000000	##FFFFFF
##312BA9	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046AD

Deuteranopia (green-blind)

#003BA7

Tritanopia (blue-blind)

#004F68

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #312ba9;
/* rgb */ color: rgb(49, 43, 169);
/* oklch */ color: oklch(39.3% 0.192 275.1);

Tailwind

colors: {
  custom: {
    50: '#7b66c4',
    500: '#312ba9',
    950: '#000000',
  },
}

SCSS

$custom: #312ba9;
$custom-light: #7b66c4;
$custom-dark: #000000;

JSON

{
  "hex": "#312ba9",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 169
  },
  "hsl": {
    "h": 242.857,
    "s": 59.434,
    "l": 41.569
  },
  "oklch": {
    "l": 0.39284,
    "c": 0.19161,
    "h": 275.1
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#312BA9

secondary

#BFC36D

accent

#E345DB

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #312BA9

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

Preview Lab → · Contrast checker → · Palette generator →