#2543B1#2543B1

#2543B1 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.5% C 0.178 H 266.8°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#2543B1
RGB	rgb(37, 67, 177)
HSL	hsl(227, 65%, 42%)
HSV	hsv(227, 79%, 69%)
CMYK	cmyk(79.1%, 62.1%, 0%, 30.6%)
CIE-LAB	lab(33.09, 29.84, -61.50)
CIE-LCH	lch(33.09, 68.36, 295.88°)
OKLab	oklab(43.46% -0.0101 -0.1779)
OKLCH	oklch(43.46% 0.178 266.8)
XYZ	xyz(10.7031, 7.5807, 42.4856)
Luminance	0.0758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2543B1 #B19325

analogous

#2589B1 #2543B1 #4D25B1

triadic

#2543B1 #B12543 #43B125

tetradic

#2543B1 #B12589 #B19325 #25B14D

square

#2543B1 #B12589 #B19325 #25B14D

split-complementary

#2543B1 #B14D25 #89B125

monochromatic

#101D4C #1A307E #2543B1 #3D5ED6 #6F88E1

Accessibility & contrast

On white

8.35

#2543B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#2543B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2543B1

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2543B1	#FFFFFF	#000000	##FFFFFF
##2543B1	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2543b1;
/* rgb */ color: rgb(37, 67, 177);
/* oklch */ color: oklch(43.5% 0.178 266.8);

Tailwind

colors: {
  custom: {
    50: '#7776c9',
    500: '#2543b1',
    950: '#000000',
  },
}

SCSS

$custom: #2543b1;
$custom-light: #7776c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2543b1",
  "rgb": {
    "r": 37,
    "g": 67,
    "b": 177
  },
  "hsl": {
    "h": 227.143,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.43463,
    "c": 0.17817,
    "h": 266.8
  },
  "luminance": 0.07582
}

Semantic roles & 50–950 ramp

primary

#2543B1

secondary

#C8B46A

accent

#C43FE8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2543B1

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

Preview Lab → · Contrast checker → · Palette generator →