#253DA8#253DA8

#253DA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.5% C 0.173 H 267.9°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#253DA8
RGB	rgb(37, 61, 168)
HSL	hsl(229, 64%, 40%)
HSV	hsv(229, 78%, 66%)
CMYK	cmyk(78%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.78, 30.40, -59.92)
CIE-LCH	lch(30.78, 67.19, 296.90°)
OKLab	oklab(41.51% -0.0063 -0.1733)
OKLCH	oklch(41.51% 0.173 267.9)
XYZ	xyz(9.4971, 6.5569, 37.8033)
Luminance	0.0656 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253DA8 #A89025

analogous

#257EA8 #253DA8 #4F25A8

triadic

#253DA8 #A8253D #3DA825

tetradic

#253DA8 #A8257E #A89025 #25A84F

square

#253DA8 #A8257E #A89025 #25A84F

split-complementary

#253DA8 #A84F25 #7EA825

monochromatic

#0F1944 #1A2B76 #253DA8 #3754D3 #697FDE

Accessibility & contrast

On white

9.08

#253DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#253DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253DA8

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253DA8	#FFFFFF	#000000	##FFFFFF
##253DA8	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #253da8;
/* rgb */ color: rgb(37, 61, 168);
/* oklch */ color: oklch(41.5% 0.173 267.9);

Tailwind

colors: {
  custom: {
    50: '#7572c3',
    500: '#253da8',
    950: '#000000',
  },
}

SCSS

$custom: #253da8;
$custom-light: #7572c3;
$custom-dark: #000000;

JSON

{
  "hex": "#253da8",
  "rgb": {
    "r": 37,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 229.008,
    "s": 63.902,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41506,
    "c": 0.17342,
    "h": 267.9
  },
  "luminance": 0.06558
}

Semantic roles & 50–950 ramp

primary

#253DA8

secondary

#C4B365

accent

#C841E7

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #253DA8

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

Preview Lab → · Contrast checker → · Palette generator →