#2539A8#2539A8

#2539A8 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.8% C 0.178 H 268.7°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#2539A8
RGB	rgb(37, 57, 168)
HSL	hsl(231, 64%, 40%)
HSV	hsv(231, 78%, 66%)
CMYK	cmyk(78%, 66.1%, 0%, 34.1%)
CIE-LAB	lab(29.78, 33.02, -61.56)
CIE-LCH	lch(29.78, 69.85, 298.21°)
OKLab	oklab(40.77% -0.004 -0.1781)
OKLCH	oklch(40.77% 0.178 268.7)
XYZ	xyz(9.2915, 6.1457, 37.7347)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2539A8 #A89425

analogous

#257AA8 #2539A8 #5325A8

triadic

#2539A8 #A82539 #39A825

tetradic

#2539A8 #A8257A #A89425 #25A853

square

#2539A8 #A8257A #A89425 #25A853

split-complementary

#2539A8 #A85325 #7AA825

monochromatic

#0F1744 #1A2876 #2539A8 #374FD3 #697BDE

Accessibility & contrast

On white

9.42

#2539A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#2539A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2539A8

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2539A8	#FFFFFF	#000000	##FFFFFF
##2539A8	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAC

Deuteranopia (green-blind)

#0040A6

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #2539a8;
/* rgb */ color: rgb(37, 57, 168);
/* oklch */ color: oklch(40.8% 0.178 268.7);

Tailwind

colors: {
  custom: {
    50: '#756fc3',
    500: '#2539a8',
    950: '#000000',
  },
}

SCSS

$custom: #2539a8;
$custom-light: #756fc3;
$custom-dark: #000000;

JSON

{
  "hex": "#2539a8",
  "rgb": {
    "r": 37,
    "g": 57,
    "b": 168
  },
  "hsl": {
    "h": 230.84,
    "s": 63.902,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40771,
    "c": 0.17817,
    "h": 268.7
  },
  "luminance": 0.06147
}

Semantic roles & 50–950 ramp

primary

#2539A8

secondary

#C4B665

accent

#CE41E7

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #2539A8

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

Preview Lab → · Contrast checker → · Palette generator →