#253B81#253B81

#253B81 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.121 H 267.2°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#253B81
RGB	rgb(37, 59, 129)
HSL	hsl(226, 55%, 33%)
HSV	hsv(226, 71%, 51%)
CMYK	cmyk(71.3%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(27.03, 16.73, -42.12)
CIE-LCH	lch(27.03, 45.32, 291.67°)
OKLab	oklab(37.71% -0.0059 -0.1211)
OKLCH	oklch(37.71% 0.121 267.2)
XYZ	xyz(6.2880, 5.1056, 21.4187)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253B81 #816B25

analogous

#256981 #253B81 #3D2581

triadic

#253B81 #81253B #3B8125

tetradic

#253B81 #812569 #816B25 #25813D

square

#253B81 #812569 #816B25 #25813D

split-complementary

#253B81 #813D25 #698125

monochromatic

#0A0F22 #172551 #253B81 #3351B1 #5370CE

Accessibility & contrast

On white

10.39

#253B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#253B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253B81

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253B81	#FFFFFF	#000000	##FFFFFF
##253B81	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D4483

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #253b81;
/* rgb */ color: rgb(37, 59, 129);
/* oklch */ color: oklch(37.7% 0.121 267.2);

Tailwind

colors: {
  custom: {
    50: '#6c70a6',
    500: '#253b81',
    950: '#000000',
  },
}

SCSS

$custom: #253b81;
$custom-light: #6c70a6;
$custom-dark: #000000;

JSON

{
  "hex": "#253b81",
  "rgb": {
    "r": 37,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 225.652,
    "s": 55.422,
    "l": 32.549
  },
  "oklch": {
    "l": 0.3771,
    "c": 0.1212,
    "h": 267.2
  },
  "luminance": 0.05106
}

Semantic roles & 50–950 ramp

primary

#253B81

secondary

#B29A50

accent

#BB49DF

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #253B81

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

Preview Lab → · Contrast checker → · Palette generator →