#2543AB#2543AB

#2543AB is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.9% C 0.170 H 266.6°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#2543AB
RGB	rgb(37, 67, 171)
HSL	hsl(227, 64%, 41%)
HSV	hsv(227, 78%, 67%)
CMYK	cmyk(78.4%, 60.8%, 0%, 32.9%)
CIE-LAB	lab(32.58, 27.56, -58.76)
CIE-LCH	lch(32.58, 64.90, 295.13°)
OKLab	oklab(42.93% -0.0101 -0.1698)
OKLCH	oklch(42.93% 0.17 266.6)
XYZ	xyz(10.1182, 7.3467, 39.4050)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2543AB #AB8D25

analogous

#2586AB #2543AB #4A25AB

triadic

#2543AB #AB2543 #43AB25

tetradic

#2543AB #AB2586 #AB8D25 #25AB4A

square

#2543AB #AB2586 #AB8D25 #25AB4A

split-complementary

#2543AB #AB4A25 #86AB25

monochromatic

#0F1C46 #1A2F79 #2543AB #395CD4 #6B85DF

Accessibility & contrast

On white

8.50

#2543AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#2543AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2543AB

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2543AB	#FFFFFF	#000000	##FFFFFF
##2543AB	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AE

Deuteranopia (green-blind)

#0047A9

Tritanopia (blue-blind)

#005E70

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #2543ab;
/* rgb */ color: rgb(37, 67, 171);
/* oklch */ color: oklch(42.9% 0.170 266.6);

Tailwind

colors: {
  custom: {
    50: '#7576c5',
    500: '#2543ab',
    950: '#000000',
  },
}

SCSS

$custom: #2543ab;
$custom-light: #7576c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2543ab",
  "rgb": {
    "r": 37,
    "g": 67,
    "b": 171
  },
  "hsl": {
    "h": 226.567,
    "s": 64.423,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42925,
    "c": 0.17014,
    "h": 266.6
  },
  "luminance": 0.07348
}

Semantic roles & 50–950 ramp

primary

#2543AB

secondary

#C5B067

accent

#C240E7

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2543AB

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

Preview Lab → · Contrast checker → · Palette generator →