#251FAB#251FAB

#251FAB is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.2% C 0.208 H 271.8°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#251FAB
RGB	rgb(37, 31, 171)
HSL	hsl(243, 69%, 40%)
HSV	hsv(243, 82%, 67%)
CMYK	cmyk(78.4%, 81.9%, 0%, 32.9%)
CIE-LAB	lab(24.68, 49.14, -71.78)
CIE-LCH	lch(24.68, 86.99, 304.40°)
OKLab	oklab(37.22% 0.0065 -0.2077)
OKLCH	oklch(37.22% 0.208 271.8)
XYZ	xyz(8.6011, 4.3126, 38.8993)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251FAB #A5AB1F

analogous

#1F5FAB #251FAB #6B1FAB

triadic

#251FAB #AB251F #1FAB25

tetradic

#251FAB #AB1F5F #A5AB1F #1FAB6B

square

#251FAB #AB1F5F #A5AB1F #1FAB6B

split-complementary

#251FAB #AB6B1F #5FAB1F

monochromatic

#0F0C43 #1A1677 #251FAB #352ED9 #6762E3

Accessibility & contrast

On white

11.27

#251FAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#251FAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251FAB

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251FAB	#FFFFFF	#000000	##FFFFFF
##251FAB	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041AF

Deuteranopia (green-blind)

#0033A9

Tritanopia (blue-blind)

#004C66

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #251fab;
/* rgb */ color: rgb(37, 31, 171);
/* oklch */ color: oklch(37.2% 0.208 271.8);

Tailwind

colors: {
  custom: {
    50: '#795fc5',
    500: '#251fab',
    950: '#000000',
  },
}

SCSS

$custom: #251fab;
$custom-light: #795fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#251fab",
  "rgb": {
    "r": 37,
    "g": 31,
    "b": 171
  },
  "hsl": {
    "h": 242.571,
    "s": 69.307,
    "l": 39.608
  },
  "oklch": {
    "l": 0.37223,
    "c": 0.20782,
    "h": 271.8
  },
  "luminance": 0.04314
}

Semantic roles & 50–950 ramp

primary

#251FAB

secondary

#C3C75E

accent

#EC3CE5

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #251FAB

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

Preview Lab → · Contrast checker → · Palette generator →