#253F81#253F81

#253F81 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.6% C 0.116 H 265.2°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#253F81
RGB	rgb(37, 63, 129)
HSL	hsl(223, 55%, 33%)
HSV	hsv(223, 71%, 51%)
CMYK	cmyk(71.3%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(28.20, 13.96, -40.24)
CIE-LCH	lch(28.20, 42.59, 289.14°)
OKLab	oklab(38.6% -0.0097 -0.1154)
OKLCH	oklch(38.6% 0.116 265.2)
XYZ	xyz(6.5015, 5.5327, 21.4899)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253F81 #816725

analogous

#256D81 #253F81 #392581

triadic

#253F81 #81253F #3F8125

tetradic

#253F81 #81256D #816725 #258139

square

#253F81 #81256D #816725 #258139

split-complementary

#253F81 #813925 #6D8125

monochromatic

#0A1122 #172851 #253F81 #3356B1 #5376CE

Accessibility & contrast

On white

9.97

#253F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#253F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253F81

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253F81	#FFFFFF	#000000	##FFFFFF
##253F81	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4783

Deuteranopia (green-blind)

#003F80

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #253f81;
/* rgb */ color: rgb(37, 63, 129);
/* oklch */ color: oklch(38.6% 0.116 265.2);

Tailwind

colors: {
  custom: {
    50: '#6c73a6',
    500: '#253f81',
    950: '#000000',
  },
}

SCSS

$custom: #253f81;
$custom-light: #6c73a6;
$custom-dark: #000000;

JSON

{
  "hex": "#253f81",
  "rgb": {
    "r": 37,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 223.043,
    "s": 55.422,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38597,
    "c": 0.11586,
    "h": 265.2
  },
  "luminance": 0.05533
}

Semantic roles & 50–950 ramp

primary

#253F81

secondary

#B29650

accent

#B449DF

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #253F81

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

Preview Lab → · Contrast checker → · Palette generator →