#2539B1#2539B1

#2539B1 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.6% C 0.190 H 268.6°. Best body text is #FFFFFF at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#2539B1
RGB	rgb(37, 57, 177)
HSL	hsl(231, 65%, 42%)
HSV	hsv(231, 79%, 69%)
CMYK	cmyk(79.1%, 67.8%, 0%, 30.6%)
CIE-LAB	lab(30.62, 36.33, -65.55)
CIE-LCH	lch(30.62, 74.95, 298.99°)
OKLab	oklab(41.65% -0.0045 -0.1898)
OKLCH	oklch(41.65% 0.19 268.6)
XYZ	xyz(10.1591, 6.4927, 42.3042)
Luminance	0.0649 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2539B1 #B19D25

analogous

#257FB1 #2539B1 #5725B1

triadic

#2539B1 #B12539 #39B125

tetradic

#2539B1 #B1257F #B19D25 #25B157

square

#2539B1 #B1257F #B19D25 #25B157

split-complementary

#2539B1 #B15725 #7FB125

monochromatic

#10184C #1A297E #2539B1 #3D53D6 #6F80E1

Accessibility & contrast

On white

9.14

#2539B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#2539B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2539B1

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2539B1	#FFFFFF	#000000	##FFFFFF
##2539B1	1.00	9.14	2.30	9.14
#FFFFFF	9.14	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB5

Deuteranopia (green-blind)

#0041AF

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #2539b1;
/* rgb */ color: rgb(37, 57, 177);
/* oklch */ color: oklch(41.6% 0.190 268.6);

Tailwind

colors: {
  custom: {
    50: '#786fc9',
    500: '#2539b1',
    950: '#000000',
  },
}

SCSS

$custom: #2539b1;
$custom-light: #786fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#2539b1",
  "rgb": {
    "r": 37,
    "g": 57,
    "b": 177
  },
  "hsl": {
    "h": 231.429,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41646,
    "c": 0.18986,
    "h": 268.6
  },
  "luminance": 0.06494
}

Semantic roles & 50–950 ramp

primary

#2539B1

secondary

#C8BA6A

accent

#D03FE8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #2539B1

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

Preview Lab → · Contrast checker → · Palette generator →