#312BA4#312BA4

#312BA4 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.8% C 0.185 H 275.6°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#312BA4
RGB	rgb(49, 43, 164)
HSL	hsl(243, 58%, 41%)
HSV	hsv(243, 74%, 64%)
CMYK	cmyk(70.1%, 73.8%, 0%, 35.7%)
CIE-LAB	lab(26.91, 41.51, -63.84)
CIE-LCH	lch(26.91, 76.15, 303.03°)
OKLab	oklab(38.76% 0.018 -0.1845)
OKLCH	oklch(38.76% 0.185 275.6)
XYZ	xyz(8.8291, 5.0602, 35.6262)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BA4 #9EA42B

analogous

#2B61A4 #312BA4 #6D2BA4

triadic

#312BA4 #A4312B #2BA431

tetradic

#312BA4 #A42B61 #9EA42B #2BA46D

square

#312BA4 #A42B61 #9EA42B #2BA46D

split-complementary

#312BA4 #A46D2B #61A42B

monochromatic

#141243 #231E74 #312BA4 #463FCD #7570D9

Accessibility & contrast

On white

10.44

#312BA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#312BA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BA4

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BA4	#FFFFFF	#000000	##FFFFFF
##312BA4	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A8

Deuteranopia (green-blind)

#003AA2

Tritanopia (blue-blind)

#004D65

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #312ba4;
/* rgb */ color: rgb(49, 43, 164);
/* oklch */ color: oklch(38.8% 0.185 275.6);

Tailwind

colors: {
  custom: {
    50: '#7a66c0',
    500: '#312ba4',
    950: '#000000',
  },
}

SCSS

$custom: #312ba4;
$custom-light: #7a66c0;
$custom-dark: #000000;

JSON

{
  "hex": "#312ba4",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 164
  },
  "hsl": {
    "h": 242.975,
    "s": 58.454,
    "l": 40.588
  },
  "oklch": {
    "l": 0.38764,
    "c": 0.1854,
    "h": 275.6
  },
  "luminance": 0.05061
}

Semantic roles & 50–950 ramp

primary

#312BA4

secondary

#BCC16A

accent

#E246DA

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #312BA4

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

Preview Lab → · Contrast checker → · Palette generator →