#2539A4#2539A4

#2539A4 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.173 H 268.8°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#2539A4
RGB	rgb(37, 57, 164)
HSL	hsl(231, 63%, 39%)
HSV	hsv(231, 77%, 64%)
CMYK	cmyk(77.4%, 65.2%, 0%, 35.7%)
CIE-LAB	lab(29.41, 31.53, -59.75)
CIE-LCH	lch(29.41, 67.56, 297.82°)
OKLab	oklab(40.39% -0.0037 -0.1728)
OKLCH	oklch(40.39% 0.173 268.8)
XYZ	xyz(8.9246, 5.9989, 35.8023)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2539A4 #A49025

analogous

#2579A4 #2539A4 #5125A4

triadic

#2539A4 #A42539 #39A425

tetradic

#2539A4 #A42579 #A49025 #25A451

square

#2539A4 #A42579 #A49025 #25A451

split-complementary

#2539A4 #A45125 #79A425

monochromatic

#0E1640 #1A2872 #2539A4 #354DD1 #6779DD

Accessibility & contrast

On white

9.55

#2539A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#2539A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2539A4

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2539A4	#FFFFFF	#000000	##FFFFFF
##2539A4	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA7

Deuteranopia (green-blind)

#003FA2

Tritanopia (blue-blind)

#005569

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2539a4;
/* rgb */ color: rgb(37, 57, 164);
/* oklch */ color: oklch(40.4% 0.173 268.8);

Tailwind

colors: {
  custom: {
    50: '#746fc0',
    500: '#2539a4',
    950: '#000000',
  },
}

SCSS

$custom: #2539a4;
$custom-light: #746fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#2539a4",
  "rgb": {
    "r": 37,
    "g": 57,
    "b": 164
  },
  "hsl": {
    "h": 230.551,
    "s": 63.184,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40389,
    "c": 0.17289,
    "h": 268.8
  },
  "luminance": 0.06
}

Semantic roles & 50–950 ramp

primary

#2539A4

secondary

#C2B362

accent

#CC42E6

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2539A4

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

Preview Lab → · Contrast checker → · Palette generator →