#31388D#31388D

#31388D is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.8% C 0.139 H 274.3°. Best body text is #FFFFFF at 10.09:1 contrast (WCAG AA passes).

Color values

HEX	#31388D
RGB	rgb(49, 56, 141)
HSL	hsl(235, 48%, 37%)
HSV	hsv(235, 65%, 55%)
CMYK	cmyk(65.2%, 60.3%, 0%, 44.7%)
CIE-LAB	lab(27.86, 25.30, -48.22)
CIE-LCH	lch(27.86, 54.45, 297.69°)
OKLab	oklab(38.81% 0.0105 -0.1387)
OKLCH	oklch(38.81% 0.139 274.3)
XYZ	xyz(7.4869, 5.4038, 25.8426)
Luminance	0.0540 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31388D #8D8631

analogous

#31668D #31388D #58318D

triadic

#31388D #8D3138 #388D31

tetradic

#31388D #8D3166 #8D8631 #318D58

square

#31388D #8D3166 #8D8631 #318D58

split-complementary

#31388D #8D5831 #668D31

monochromatic

#111432 #212660 #31388D #414ABA #6C74CC

Accessibility & contrast

On white

10.09

#31388D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#31388D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31388D

10.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31388D	#FFFFFF	#000000	##FFFFFF
##31388D	1.00	10.09	2.08	10.09
#FFFFFF	10.09	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #31388d;
/* rgb */ color: rgb(49, 56, 141);
/* oklch */ color: oklch(38.8% 0.139 274.3);

Tailwind

colors: {
  custom: {
    50: '#746eaf',
    500: '#31388d',
    950: '#000000',
  },
}

SCSS

$custom: #31388d;
$custom-light: #746eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#31388d",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 141
  },
  "hsl": {
    "h": 235.435,
    "s": 48.421,
    "l": 37.255
  },
  "oklch": {
    "l": 0.38811,
    "c": 0.13913,
    "h": 274.3
  },
  "luminance": 0.05404
}

Semantic roles & 50–950 ramp

primary

#31388D

secondary

#B4AE66

accent

#CE50D8

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #31388D

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

Preview Lab → · Contrast checker → · Palette generator →