#251B8A#251B8A

#251B8A is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.172 H 275.4°. Best body text is #FFFFFF at 13.11:1 contrast (WCAG AA passes).

Color values

HEX	#251B8A
RGB	rgb(37, 27, 138)
HSL	hsl(245, 67%, 32%)
HSV	hsv(245, 80%, 54%)
CMYK	cmyk(73.2%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(20.09, 40.62, -59.12)
CIE-LCH	lch(20.09, 71.73, 304.49°)
OKLab	oklab(32.9% 0.0161 -0.1709)
OKLCH	oklch(32.9% 0.172 275.4)
XYZ	xyz(5.7408, 3.0116, 24.3186)
Luminance	0.0301 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251B8A #808A1B

analogous

#1B498A #251B8A #5C1B8A

triadic

#251B8A #8A251B #1B8A25

tetradic

#251B8A #8A1B49 #808A1B #1B8A5C

square

#251B8A #8A1B49 #808A1B #1B8A5C

split-complementary

#251B8A #8A5C1B #498A1B

monochromatic

#0A0724 #171157 #251B8A #3325BD #5245DB

Accessibility & contrast

On white

13.11

#251B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#251B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251B8A

13.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251B8A	#FFFFFF	#000000	##FFFFFF
##251B8A	1.00	13.11	1.60	13.11
#FFFFFF	13.11	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358D

Deuteranopia (green-blind)

#002B88

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #251b8a;
/* rgb */ color: rgb(37, 27, 138);
/* oklch */ color: oklch(32.9% 0.172 275.4);

Tailwind

colors: {
  custom: {
    50: '#715aad',
    500: '#251b8a',
    950: '#000000',
  },
}

SCSS

$custom: #251b8a;
$custom-light: #715aad;
$custom-dark: #000000;

JSON

{
  "hex": "#251b8a",
  "rgb": {
    "r": 37,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 245.405,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32896,
    "c": 0.17169,
    "h": 275.4
  },
  "luminance": 0.03012
}

Semantic roles & 50–950 ramp

primary

#251B8A

secondary

#B1BC45

accent

#EA3EDB

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #251B8A

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

Preview Lab → · Contrast checker → · Palette generator →