#253BB0#253BB0

#253BB0 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.186 H 268.3°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#253BB0
RGB	rgb(37, 59, 176)
HSL	hsl(231, 65%, 42%)
HSV	hsv(231, 79%, 69%)
CMYK	cmyk(79%, 66.5%, 0%, 31%)
CIE-LAB	lab(31.01, 34.68, -64.33)
CIE-LCH	lch(31.01, 73.08, 298.33°)
OKLab	oklab(41.9% -0.0055 -0.1862)
OKLCH	oklch(41.9% 0.186 268.3)
XYZ	xyz(10.1607, 6.6547, 41.8149)
Luminance	0.0666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253BB0 #B09A25

analogous

#2580B0 #253BB0 #5525B0

triadic

#253BB0 #B0253B #3BB025

tetradic

#253BB0 #B02580 #B09A25 #25B055

square

#253BB0 #B02580 #B09A25 #25B055

split-complementary

#253BB0 #B05525 #80B025

monochromatic

#10194B #1A2A7D #253BB0 #3C55D6 #6F81E1

Accessibility & contrast

On white

9.01

#253BB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#253BB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253BB0

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253BB0	#FFFFFF	#000000	##FFFFFF
##253BB0	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #253bb0;
/* rgb */ color: rgb(37, 59, 176);
/* oklch */ color: oklch(41.9% 0.186 268.3);

Tailwind

colors: {
  custom: {
    50: '#7771c9',
    500: '#253bb0',
    950: '#000000',
  },
}

SCSS

$custom: #253bb0;
$custom-light: #7771c9;
$custom-dark: #000000;

JSON

{
  "hex": "#253bb0",
  "rgb": {
    "r": 37,
    "g": 59,
    "b": 176
  },
  "hsl": {
    "h": 230.504,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.41898,
    "c": 0.1863,
    "h": 268.3
  },
  "luminance": 0.06656
}

Semantic roles & 50–950 ramp

primary

#253BB0

secondary

#C7B86A

accent

#CE40E8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #253BB0

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

Preview Lab → · Contrast checker → · Palette generator →