#2548B1#2548B1

#2548B1 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.4% C 0.172 H 265.6°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#2548B1
RGB	rgb(37, 72, 177)
HSL	hsl(225, 65%, 42%)
HSV	hsv(225, 79%, 69%)
CMYK	cmyk(79.1%, 59.3%, 0%, 30.6%)
CIE-LAB	lab(34.40, 26.53, -59.37)
CIE-LCH	lch(34.40, 65.03, 294.07°)
OKLab	oklab(44.43% -0.0132 -0.1716)
OKLCH	oklch(44.43% 0.172 265.6)
XYZ	xyz(11.0133, 8.2011, 42.5890)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2548B1 #B18E25

analogous

#258EB1 #2548B1 #4825B1

triadic

#2548B1 #B12548 #48B125

tetradic

#2548B1 #B1258E #B18E25 #25B148

square

#2548B1 #B1258E #B18E25 #25B148

split-complementary

#2548B1 #B14825 #8EB125

monochromatic

#101F4C #1A337E #2548B1 #3D63D6 #6F8CE1

Accessibility & contrast

On white

7.95

#2548B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#2548B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2548B1

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2548B1	#FFFFFF	#000000	##FFFFFF
##2548B1	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B5

Deuteranopia (green-blind)

#004BAF

Tritanopia (blue-blind)

#006375

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #2548b1;
/* rgb */ color: rgb(37, 72, 177);
/* oklch */ color: oklch(44.4% 0.172 265.6);

Tailwind

colors: {
  custom: {
    50: '#767ac9',
    500: '#2548b1',
    950: '#000000',
  },
}

SCSS

$custom: #2548b1;
$custom-light: #767ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#2548b1",
  "rgb": {
    "r": 37,
    "g": 72,
    "b": 177
  },
  "hsl": {
    "h": 225,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.44434,
    "c": 0.17207,
    "h": 265.6
  },
  "luminance": 0.08202
}

Semantic roles & 50–950 ramp

primary

#2548B1

secondary

#C8B06A

accent

#BE3FE8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #2548B1

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

Preview Lab → · Contrast checker → · Palette generator →