#3539AB#3539AB

#3539AB is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.178 H 274.1°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#3539AB
RGB	rgb(53, 57, 171)
HSL	hsl(238, 53%, 44%)
HSV	hsv(238, 69%, 67%)
CMYK	cmyk(69%, 66.7%, 0%, 32.9%)
CIE-LAB	lab(30.93, 35.93, -61.43)
CIE-LCH	lch(30.93, 71.17, 300.32°)
OKLab	oklab(41.93% 0.0128 -0.1774)
OKLCH	oklch(41.93% 0.178 274.1)
XYZ	xyz(10.2796, 6.6225, 39.2567)
Luminance	0.0662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3539AB #ABA735

analogous

#3574AB #3539AB #6C35AB

triadic

#3539AB #AB3539 #39AB35

tetradic

#3539AB #AB3574 #ABA735 #35AB6C

square

#3539AB #AB3574 #ABA735 #35AB6C

split-complementary

#3539AB #AB6C35 #74AB35

monochromatic

#181A4E #27297C #3539AB #5357CA #8285D8

Accessibility & contrast

On white

9.03

#3539AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3539AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3539AB

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3539AB	#FFFFFF	#000000	##FFFFFF
##3539AB	1.00	9.03	2.32	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00576D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3539ab;
/* rgb */ color: rgb(53, 57, 171);
/* oklch */ color: oklch(41.9% 0.178 274.1);

Tailwind

colors: {
  custom: {
    50: '#7c70c5',
    500: '#3539ab',
    950: '#000000',
  },
}

SCSS

$custom: #3539ab;
$custom-light: #7c70c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3539ab",
  "rgb": {
    "r": 53,
    "g": 57,
    "b": 171
  },
  "hsl": {
    "h": 237.966,
    "s": 52.679,
    "l": 43.922
  },
  "oklch": {
    "l": 0.41934,
    "c": 0.17786,
    "h": 274.1
  },
  "luminance": 0.06623
}

Semantic roles & 50–950 ramp

primary

#3539AB

secondary

#C2BF7A

accent

#D74CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3539AB

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

Preview Lab → · Contrast checker → · Palette generator →