#253BB1#253BB1

#253BB1 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.188 H 268.3°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#253BB1
RGB	rgb(37, 59, 177)
HSL	hsl(231, 65%, 42%)
HSV	hsv(231, 79%, 69%)
CMYK	cmyk(79.1%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(31.10, 35.05, -64.77)
CIE-LCH	lch(31.10, 73.64, 298.42°)
OKLab	oklab(42% -0.0056 -0.1875)
OKLCH	oklch(42% 0.188 268.3)
XYZ	xyz(10.2600, 6.6944, 42.3379)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253BB1 #B19B25

analogous

#2581B1 #253BB1 #5525B1

triadic

#253BB1 #B1253B #3BB125

tetradic

#253BB1 #B12581 #B19B25 #25B155

square

#253BB1 #B12581 #B19B25 #25B155

split-complementary

#253BB1 #B15525 #81B125

monochromatic

#10194C #1A2A7E #253BB1 #3D55D6 #6F81E1

Accessibility & contrast

On white

8.98

#253BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#253BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253BB1

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253BB1	#FFFFFF	#000000	##FFFFFF
##253BB1	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #253bb1;
/* rgb */ color: rgb(37, 59, 177);
/* oklch */ color: oklch(42.0% 0.188 268.3);

Tailwind

colors: {
  custom: {
    50: '#7871c9',
    500: '#253bb1',
    950: '#000000',
  },
}

SCSS

$custom: #253bb1;
$custom-light: #7871c9;
$custom-dark: #000000;

JSON

{
  "hex": "#253bb1",
  "rgb": {
    "r": 37,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 230.571,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41995,
    "c": 0.18759,
    "h": 268.3
  },
  "luminance": 0.06696
}

Semantic roles & 50–950 ramp

primary

#253BB1

secondary

#C8B96A

accent

#CE3FE8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #253BB1

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

Preview Lab → · Contrast checker → · Palette generator →