#2539B2#2539B2

#2539B2 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.7% C 0.191 H 268.6°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#2539B2
RGB	rgb(37, 57, 178)
HSL	hsl(231, 66%, 42%)
HSV	hsv(231, 79%, 70%)
CMYK	cmyk(79.2%, 68%, 0%, 30.2%)
CIE-LAB	lab(30.72, 36.69, -65.99)
CIE-LCH	lch(30.72, 75.51, 299.07°)
OKLab	oklab(41.75% -0.0046 -0.1911)
OKLCH	oklch(41.75% 0.191 268.6)
XYZ	xyz(10.2592, 6.5327, 42.8311)
Luminance	0.0653 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2539B2 #B29E25

analogous

#2580B2 #2539B2 #5725B2

triadic

#2539B2 #B22539 #39B225

tetradic

#2539B2 #B22580 #B29E25 #25B257

square

#2539B2 #B22580 #B29E25 #25B257

split-complementary

#2539B2 #B25725 #80B225

monochromatic

#10194D #1A297F #2539B2 #3D53D7 #7080E1

Accessibility & contrast

On white

9.10

#2539B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#2539B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2539B2

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2539B2	#FFFFFF	#000000	##FFFFFF
##2539B2	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB6

Deuteranopia (green-blind)

#0042B0

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #2539b2;
/* rgb */ color: rgb(37, 57, 178);
/* oklch */ color: oklch(41.7% 0.191 268.6);

Tailwind

colors: {
  custom: {
    50: '#786fca',
    500: '#2539b2',
    950: '#000000',
  },
}

SCSS

$custom: #2539b2;
$custom-light: #786fca;
$custom-dark: #000000;

JSON

{
  "hex": "#2539b2",
  "rgb": {
    "r": 37,
    "g": 57,
    "b": 178
  },
  "hsl": {
    "h": 231.489,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.41745,
    "c": 0.19115,
    "h": 268.6
  },
  "luminance": 0.06534
}

Semantic roles & 50–950 ramp

primary

#2539B2

secondary

#C8BB6B

accent

#D13FE9

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2539B2

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

Preview Lab → · Contrast checker → · Palette generator →