#31318A#31318A

#31318A is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.2% C 0.144 H 276.8°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#31318A
RGB	rgb(49, 49, 138)
HSL	hsl(240, 48%, 37%)
HSV	hsv(240, 64%, 54%)
CMYK	cmyk(64.5%, 64.5%, 0%, 45.9%)
CIE-LAB	lab(25.81, 28.86, -49.68)
CIE-LCH	lch(25.81, 57.45, 300.15°)
OKLab	oklab(37.23% 0.0171 -0.1431)
OKLCH	oklch(37.23% 0.144 276.8)
XYZ	xyz(6.9509, 4.6840, 24.5776)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31318A #8A8A31

analogous

#315E8A #31318A #5E318A

triadic

#31318A #8A3131 #318A31

tetradic

#31318A #8A315E #8A8A31 #318A5E

square

#31318A #8A315E #8A8A31 #318A5E

split-complementary

#31318A #8A5E31 #5E8A31

monochromatic

#111130 #21215D #31318A #4141B7 #6B6BCA

Accessibility & contrast

On white

10.84

#31318A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#31318A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31318A

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31318A	#FFFFFF	#000000	##FFFFFF
##31318A	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418D

Deuteranopia (green-blind)

#003988

Tritanopia (blue-blind)

#004758

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #31318a;
/* rgb */ color: rgb(49, 49, 138);
/* oklch */ color: oklch(37.2% 0.144 276.8);

Tailwind

colors: {
  custom: {
    50: '#7469ad',
    500: '#31318a',
    950: '#000000',
  },
}

SCSS

$custom: #31318a;
$custom-light: #7469ad;
$custom-dark: #000000;

JSON

{
  "hex": "#31318a",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 138
  },
  "hsl": {
    "h": 240,
    "s": 47.594,
    "l": 36.667
  },
  "oklch": {
    "l": 0.37229,
    "c": 0.1441,
    "h": 276.8
  },
  "luminance": 0.04685
}

Semantic roles & 50–950 ramp

primary

#31318A

secondary

#B2B265

accent

#D751D7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #31318A

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

Preview Lab → · Contrast checker → · Palette generator →