#253F8B#253F8B

#253F8B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.131 H 266.2°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#253F8B
RGB	rgb(37, 63, 139)
HSL	hsl(225, 58%, 35%)
HSV	hsv(225, 73%, 55%)
CMYK	cmyk(73.4%, 54.7%, 0%, 45.5%)
CIE-LAB	lab(28.93, 17.88, -45.27)
CIE-LCH	lch(28.93, 48.67, 291.55°)
OKLab	oklab(39.38% -0.0086 -0.1302)
OKLCH	oklch(39.38% 0.131 266.2)
XYZ	xyz(7.1990, 5.8117, 25.1635)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253F8B #8B7125

analogous

#25728B #253F8B #3E258B

triadic

#253F8B #8B253F #3F8B25

tetradic

#253F8B #8B2572 #8B7125 #258B3E

square

#253F8B #8B2572 #8B7125 #258B3E

split-complementary

#253F8B #8B3E25 #728B25

monochromatic

#0B132A #18295B #253F8B #3255BB #5877D3

Accessibility & contrast

On white

9.71

#253F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#253F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253F8B

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253F8B	#FFFFFF	#000000	##FFFFFF
##253F8B	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07498E

Deuteranopia (green-blind)

#004089

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #253f8b;
/* rgb */ color: rgb(37, 63, 139);
/* oklch */ color: oklch(39.4% 0.131 266.2);

Tailwind

colors: {
  custom: {
    50: '#6e73ad',
    500: '#253f8b',
    950: '#000000',
  },
}

SCSS

$custom: #253f8b;
$custom-light: #6e73ad;
$custom-dark: #000000;

JSON

{
  "hex": "#253f8b",
  "rgb": {
    "r": 37,
    "g": 63,
    "b": 139
  },
  "hsl": {
    "h": 224.706,
    "s": 57.955,
    "l": 34.51
  },
  "oklch": {
    "l": 0.39384,
    "c": 0.13053,
    "h": 266.2
  },
  "luminance": 0.05812
}

Semantic roles & 50–950 ramp

primary

#253F8B

secondary

#B79E55

accent

#BA47E1

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #253F8B

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

Preview Lab → · Contrast checker → · Palette generator →