#253DB1#253DB1

#253DB1 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.185 H 267.9°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#253DB1
RGB	rgb(37, 61, 177)
HSL	hsl(230, 65%, 42%)
HSV	hsv(230, 79%, 69%)
CMYK	cmyk(79.1%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(31.59, 33.76, -63.97)
CIE-LCH	lch(31.59, 72.33, 297.82°)
OKLab	oklab(42.35% -0.0066 -0.1852)
OKLCH	oklch(42.35% 0.185 267.9)
XYZ	xyz(10.3647, 6.9039, 42.3728)
Luminance	0.0691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253DB1 #B19925

analogous

#2583B1 #253DB1 #5325B1

triadic

#253DB1 #B1253D #3DB125

tetradic

#253DB1 #B12583 #B19925 #25B153

square

#253DB1 #B12583 #B19925 #25B153

split-complementary

#253DB1 #B15325 #83B125

monochromatic

#101A4C #1A2C7E #253DB1 #3D57D6 #6F83E1

Accessibility & contrast

On white

8.82

#253DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#253DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253DB1

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253DB1	#FFFFFF	#000000	##FFFFFF
##253DB1	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0044AF

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #253db1;
/* rgb */ color: rgb(37, 61, 177);
/* oklch */ color: oklch(42.4% 0.185 267.9);

Tailwind

colors: {
  custom: {
    50: '#7772c9',
    500: '#253db1',
    950: '#000000',
  },
}

SCSS

$custom: #253db1;
$custom-light: #7772c9;
$custom-dark: #000000;

JSON

{
  "hex": "#253db1",
  "rgb": {
    "r": 37,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 229.714,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42351,
    "c": 0.18528,
    "h": 267.9
  },
  "luminance": 0.06905
}

Semantic roles & 50–950 ramp

primary

#253DB1

secondary

#C8B86A

accent

#CB3FE8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #253DB1

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

Preview Lab → · Contrast checker → · Palette generator →