#251581#251581

#251581 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.1% C 0.166 H 277.4°. Best body text is #FFFFFF at 13.97:1 contrast (WCAG AA passes).

Color values

HEX	#251581
RGB	rgb(37, 21, 129)
HSL	hsl(249, 72%, 29%)
HSV	hsv(249, 84%, 51%)
CMYK	cmyk(71.3%, 83.7%, 0%, 49.4%)
CIE-LAB	lab(17.98, 40.77, -56.94)
CIE-LCH	lch(17.98, 70.03, 305.61°)
OKLab	oklab(31.12% 0.0213 -0.1645)
OKLCH	oklch(31.12% 0.166 277.4)
XYZ	xyz(4.9923, 2.5142, 20.9868)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251581 #718115

analogous

#153B81 #251581 #5B1581

triadic

#251581 #812515 #158125

tetradic

#251581 #81153B #718115 #15815B

square

#251581 #81153B #718115 #15815B

split-complementary

#251581 #815B15 #3B8115

monochromatic

#08041A #160C4C #251581 #341EB6 #4C33DE

Accessibility & contrast

On white

13.97

#251581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#251581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251581

13.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251581	#FFFFFF	#000000	##FFFFFF
##251581	1.00	13.97	1.50	13.97
#FFFFFF	13.97	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003084

Deuteranopia (green-blind)

#00277F

Tritanopia (blue-blind)

#00374C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #251581;
/* rgb */ color: rgb(37, 21, 129);
/* oklch */ color: oklch(31.1% 0.166 277.4);

Tailwind

colors: {
  custom: {
    50: '#6f56a7',
    500: '#251581',
    950: '#000000',
  },
}

SCSS

$custom: #251581;
$custom-light: #6f56a7;
$custom-dark: #000000;

JSON

{
  "hex": "#251581",
  "rgb": {
    "r": 37,
    "g": 21,
    "b": 129
  },
  "hsl": {
    "h": 248.889,
    "s": 72,
    "l": 29.412
  },
  "oklch": {
    "l": 0.3112,
    "c": 0.1659,
    "h": 277.4
  },
  "luminance": 0.02515
}

Semantic roles & 50–950 ramp

primary

#251581

secondary

#A4B63C

accent

#EF39D4

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #251581

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

Preview Lab → · Contrast checker → · Palette generator →