#2543B3#2543B3

#2543B3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.6% C 0.181 H 266.8°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#2543B3
RGB	rgb(37, 67, 179)
HSL	hsl(227, 66%, 42%)
HSV	hsv(227, 79%, 70%)
CMYK	cmyk(79.3%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(33.27, 30.59, -62.41)
CIE-LCH	lch(33.27, 69.50, 296.12°)
OKLab	oklab(43.64% -0.0101 -0.1805)
OKLCH	oklch(43.64% 0.181 266.8)
XYZ	xyz(10.9039, 7.6610, 43.5431)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2543B3 #B39525

analogous

#258AB3 #2543B3 #4E25B3

triadic

#2543B3 #B32543 #43B325

tetradic

#2543B3 #B3258A #B39525 #25B34E

square

#2543B3 #B3258A #B39525 #25B34E

split-complementary

#2543B3 #B34E25 #8AB325

monochromatic

#101D4E #1B3080 #2543B3 #3E5ED7 #7189E2

Accessibility & contrast

On white

8.29

#2543B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#2543B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2543B3

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2543B3	#FFFFFF	#000000	##FFFFFF
##2543B3	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2543b3;
/* rgb */ color: rgb(37, 67, 179);
/* oklch */ color: oklch(43.6% 0.181 266.8);

Tailwind

colors: {
  custom: {
    50: '#7776cb',
    500: '#2543b3',
    950: '#000000',
  },
}

SCSS

$custom: #2543b3;
$custom-light: #7776cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2543b3",
  "rgb": {
    "r": 37,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 227.324,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.43644,
    "c": 0.18081,
    "h": 266.8
  },
  "luminance": 0.07662
}

Semantic roles & 50–950 ramp

primary

#2543B3

secondary

#C8B56B

accent

#C53FE9

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2543B3

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

Preview Lab → · Contrast checker → · Palette generator →