#312BA1#312BA1

#312BA1 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.5% C 0.182 H 275.9°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#312BA1
RGB	rgb(49, 43, 161)
HSL	hsl(243, 58%, 40%)
HSV	hsv(243, 73%, 63%)
CMYK	cmyk(69.6%, 73.3%, 0%, 36.9%)
CIE-LAB	lab(26.60, 40.51, -62.52)
CIE-LCH	lch(26.60, 74.50, 302.94°)
OKLab	oklab(38.46% 0.0185 -0.1807)
OKLCH	oklch(38.46% 0.182 275.9)
XYZ	xyz(8.5614, 4.9531, 34.2162)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BA1 #9BA12B

analogous

#2B60A1 #312BA1 #6C2BA1

triadic

#312BA1 #A1312B #2BA131

tetradic

#312BA1 #A12B60 #9BA12B #2BA16C

square

#312BA1 #A12B60 #9BA12B #2BA16C

split-complementary

#312BA1 #A16C2B #60A12B

monochromatic

#141140 #221E71 #312BA1 #453ECB #746ED8

Accessibility & contrast

On white

10.55

#312BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#312BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BA1

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BA1	#FFFFFF	#000000	##FFFFFF
##312BA1	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A4

Deuteranopia (green-blind)

#003A9F

Tritanopia (blue-blind)

#004C63

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #312ba1;
/* rgb */ color: rgb(49, 43, 161);
/* oklch */ color: oklch(38.5% 0.182 275.9);

Tailwind

colors: {
  custom: {
    50: '#7966be',
    500: '#312ba1',
    950: '#000000',
  },
}

SCSS

$custom: #312ba1;
$custom-light: #7966be;
$custom-dark: #000000;

JSON

{
  "hex": "#312ba1",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 161
  },
  "hsl": {
    "h": 243.051,
    "s": 57.843,
    "l": 40
  },
  "oklch": {
    "l": 0.38456,
    "c": 0.18164,
    "h": 275.9
  },
  "luminance": 0.04954
}

Semantic roles & 50–950 ramp

primary

#312BA1

secondary

#BBBF69

accent

#E147D9

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #312BA1

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

Preview Lab → · Contrast checker → · Palette generator →