#31257B#31257B

#31257B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.8% C 0.139 H 282.3°. Best body text is #FFFFFF at 12.49:1 contrast (WCAG AA passes).

Color values

HEX	#31257B
RGB	rgb(49, 37, 123)
HSL	hsl(248, 54%, 31%)
HSV	hsv(248, 70%, 48%)
CMYK	cmyk(60.2%, 69.9%, 0%, 51.8%)
CIE-LAB	lab(21.60, 31.35, -47.13)
CIE-LCH	lch(21.60, 56.61, 303.63°)
OKLab	oklab(33.75% 0.0297 -0.1356)
OKLCH	oklch(33.75% 0.139 282.3)
XYZ	xyz(5.5022, 3.4058, 19.1025)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31257B #6F7B25

analogous

#25447B #31257B #5C257B

triadic

#31257B #7B3125 #257B31

tetradic

#31257B #7B2544 #6F7B25 #257B5C

square

#31257B #7B2544 #6F7B25 #257B5C

split-complementary

#31257B #7B5C25 #447B25

monochromatic

#0C091D #1E174C #31257B #4433AA #6150CA

Accessibility & contrast

On white

12.49

#31257B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#31257B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31257B

12.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31257B	#FFFFFF	#000000	##FFFFFF
##31257B	1.00	12.49	1.68	12.49
#FFFFFF	12.49	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377E

Deuteranopia (green-blind)

#003179

Tritanopia (blue-blind)

#063B4C

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #31257b;
/* rgb */ color: rgb(49, 37, 123);
/* oklch */ color: oklch(33.8% 0.139 282.3);

Tailwind

colors: {
  custom: {
    50: '#7260a2',
    500: '#31257b',
    950: '#000000',
  },
}

SCSS

$custom: #31257b;
$custom-light: #7260a2;
$custom-dark: #000000;

JSON

{
  "hex": "#31257b",
  "rgb": {
    "r": 49,
    "g": 37,
    "b": 123
  },
  "hsl": {
    "h": 248.372,
    "s": 53.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.33753,
    "c": 0.13886,
    "h": 282.3
  },
  "luminance": 0.03406
}

Semantic roles & 50–950 ramp

primary

#31257B

secondary

#A0AD4F

accent

#DD4BC9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09050F

muted

#7B797F

Preview Lab

Preview with #31257B

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

Preview Lab → · Contrast checker → · Palette generator →