#31378F#31378F

#31378F is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.8% C 0.143 H 274.6°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#31378F
RGB	rgb(49, 55, 143)
HSL	hsl(236, 49%, 38%)
HSV	hsv(236, 66%, 56%)
CMYK	cmyk(65.7%, 61.5%, 0%, 43.9%)
CIE-LAB	lab(27.76, 26.69, -49.61)
CIE-LCH	lch(27.76, 56.33, 298.28°)
OKLab	oklab(38.79% 0.0114 -0.1428)
OKLCH	oklch(38.79% 0.143 274.6)
XYZ	xyz(7.5891, 5.3679, 26.6174)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31378F #8F8931

analogous

#31668F #31378F #5A318F

triadic

#31378F #8F3137 #378F31

tetradic

#31378F #8F3166 #8F8931 #318F5A

square

#31378F #8F3166 #8F8931 #318F5A

split-complementary

#31378F #8F5A31 #668F31

monochromatic

#121434 #212561 #31378F #4149BD #6D73CD

Accessibility & contrast

On white

10.13

#31378F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#31378F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31378F

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31378F	#FFFFFF	#000000	##FFFFFF
##31378F	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #31378f;
/* rgb */ color: rgb(49, 55, 143);
/* oklch */ color: oklch(38.8% 0.143 274.6);

Tailwind

colors: {
  custom: {
    50: '#746db1',
    500: '#31378f',
    950: '#000000',
  },
}

SCSS

$custom: #31378f;
$custom-light: #746db1;
$custom-dark: #000000;

JSON

{
  "hex": "#31378f",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 143
  },
  "hsl": {
    "h": 236.17,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.3879,
    "c": 0.1433,
    "h": 274.6
  },
  "luminance": 0.05369
}

Semantic roles & 50–950 ramp

primary

#31378F

secondary

#B5B067

accent

#D04FD9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #31378F

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

Preview Lab → · Contrast checker → · Palette generator →