#251DB3#251DB3

#251DB3 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 38.0% C 0.218 H 271.3°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#251DB3
RGB	rgb(37, 29, 179)
HSL	hsl(243, 72%, 41%)
HSV	hsv(243, 84%, 70%)
CMYK	cmyk(79.3%, 83.8%, 0%, 29.8%)
CIE-LAB	lab(25.34, 52.52, -75.49)
CIE-LCH	lch(25.34, 91.96, 304.83°)
OKLab	oklab(37.96% 0.005 -0.2184)
OKLCH	oklch(37.96% 0.218 271.3)
XYZ	xyz(9.3363, 4.5257, 43.0206)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251DB3 #ABB31D

analogous

#1D60B3 #251DB3 #701DB3

triadic

#251DB3 #B3251D #1DB325

tetradic

#251DB3 #B31D60 #ABB31D #1DB370

square

#251DB3 #B31D60 #ABB31D #1DB370

split-complementary

#251DB3 #B3701D #60B31D

monochromatic

#0F0C4A #1A147E #251DB3 #3930DD #6B64E6

Accessibility & contrast

On white

11.02

#251DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#251DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251DB3

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251DB3	#FFFFFF	#000000	##FFFFFF
##251DB3	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #251db3;
/* rgb */ color: rgb(37, 29, 179);
/* oklch */ color: oklch(38.0% 0.218 271.3);

Tailwind

colors: {
  custom: {
    50: '#7b5ecb',
    500: '#251db3',
    950: '#000000',
  },
}

SCSS

$custom: #251db3;
$custom-light: #7b5ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#251db3",
  "rgb": {
    "r": 37,
    "g": 29,
    "b": 179
  },
  "hsl": {
    "h": 243.2,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.37958,
    "c": 0.21848,
    "h": 271.3
  },
  "luminance": 0.04527
}

Semantic roles & 50–950 ramp

primary

#251DB3

secondary

#C5CB61

accent

#EF39E5

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #251DB3

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

Preview Lab → · Contrast checker → · Palette generator →