#2548B3#2548B3

#2548B3 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.6% C 0.175 H 265.7°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#2548B3
RGB	rgb(37, 72, 179)
HSL	hsl(225, 66%, 42%)
HSV	hsv(225, 79%, 70%)
CMYK	cmyk(79.3%, 59.8%, 0%, 29.8%)
CIE-LAB	lab(34.56, 27.29, -60.29)
CIE-LCH	lch(34.56, 66.18, 294.36°)
OKLab	oklab(44.61% -0.0132 -0.1743)
OKLCH	oklch(44.61% 0.175 265.7)
XYZ	xyz(11.2141, 8.2814, 43.6465)
Luminance	0.0828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2548B3 #B39025

analogous

#258FB3 #2548B3 #4925B3

triadic

#2548B3 #B32548 #48B325

tetradic

#2548B3 #B3258F #B39025 #25B349

square

#2548B3 #B3258F #B39025 #25B349

split-complementary

#2548B3 #B34925 #8FB325

monochromatic

#101F4E #1B3480 #2548B3 #3E64D7 #718DE2

Accessibility & contrast

On white

7.90

#2548B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#2548B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2548B3

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2548B3	#FFFFFF	#000000	##FFFFFF
##2548B3	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B7

Deuteranopia (green-blind)

#004BB1

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #2548b3;
/* rgb */ color: rgb(37, 72, 179);
/* oklch */ color: oklch(44.6% 0.175 265.7);

Tailwind

colors: {
  custom: {
    50: '#777acb',
    500: '#2548b3',
    950: '#000000',
  },
}

SCSS

$custom: #2548b3;
$custom-light: #777acb;
$custom-dark: #000000;

JSON

{
  "hex": "#2548b3",
  "rgb": {
    "r": 37,
    "g": 72,
    "b": 179
  },
  "hsl": {
    "h": 225.211,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.44607,
    "c": 0.17476,
    "h": 265.7
  },
  "luminance": 0.08283
}

Semantic roles & 50–950 ramp

primary

#2548B3

secondary

#C8B16B

accent

#BF3FE9

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #2548B3

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

Preview Lab → · Contrast checker → · Palette generator →