#2537A4#2537A4

#2537A4 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.0% C 0.175 H 269.2°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#2537A4
RGB	rgb(37, 55, 164)
HSL	hsl(231, 63%, 39%)
HSV	hsv(231, 77%, 64%)
CMYK	cmyk(77.4%, 66.5%, 0%, 35.7%)
CIE-LAB	lab(28.92, 32.83, -60.56)
CIE-LCH	lch(28.92, 68.89, 298.46°)
OKLab	oklab(40.03% -0.0026 -0.1752)
OKLCH	oklch(40.03% 0.175 269.2)
XYZ	xyz(8.8277, 5.8051, 35.7700)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2537A4 #A49225

analogous

#2577A4 #2537A4 #5325A4

triadic

#2537A4 #A42537 #37A425

tetradic

#2537A4 #A42577 #A49225 #25A453

square

#2537A4 #A42577 #A49225 #25A453

split-complementary

#2537A4 #A45325 #77A425

monochromatic

#0E1640 #1A2672 #2537A4 #354BD1 #6777DD

Accessibility & contrast

On white

9.72

#2537A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#2537A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2537A4

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2537A4	#FFFFFF	#000000	##FFFFFF
##2537A4	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA7

Deuteranopia (green-blind)

#003EA2

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2537a4;
/* rgb */ color: rgb(37, 55, 164);
/* oklch */ color: oklch(40.0% 0.175 269.2);

Tailwind

colors: {
  custom: {
    50: '#756ec0',
    500: '#2537a4',
    950: '#000000',
  },
}

SCSS

$custom: #2537a4;
$custom-light: #756ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#2537a4",
  "rgb": {
    "r": 37,
    "g": 55,
    "b": 164
  },
  "hsl": {
    "h": 231.496,
    "s": 63.184,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40027,
    "c": 0.17526,
    "h": 269.2
  },
  "luminance": 0.05806
}

Semantic roles & 50–950 ramp

primary

#2537A4

secondary

#C2B562

accent

#CF42E6

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2537A4

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

Preview Lab → · Contrast checker → · Palette generator →