#42539D#42539D

#42539D is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.7% C 0.121 H 271.3°. Best body text is #FFFFFF at 7.10:1 contrast (WCAG AA passes).

Color values

HEX	#42539D
RGB	rgb(66, 83, 157)
HSL	hsl(229, 41%, 44%)
HSV	hsv(229, 58%, 62%)
CMYK	cmyk(58%, 47.1%, 0%, 38.4%)
CIE-LAB	lab(37.44, 16.40, -42.44)
CIE-LCH	lch(37.44, 45.50, 291.13°)
OKLab	oklab(46.68% 0.0027 -0.121)
OKLCH	oklch(46.68% 0.121 271.3)
XYZ	xyz(11.4238, 9.7782, 33.1771)
Luminance	0.0978 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42539D #9D8C42

analogous

#42809D #42539D #5E429D

triadic

#42539D #9D4253 #539D42

tetradic

#42539D #9D4280 #9D8C42 #429D5E

square

#42539D #9D4280 #9D8C42 #429D5E

split-complementary

#42539D #9D5E42 #809D42

monochromatic

#1E2547 #303C72 #42539D #6071BC #8B98CE

Accessibility & contrast

On white

7.10

#42539D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#42539D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42539D

7.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42539D	#FFFFFF	#000000	##FFFFFF
##42539D	1.00	7.10	2.96	7.10
#FFFFFF	7.10	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315CA0

Deuteranopia (green-blind)

#24549B

Tritanopia (blue-blind)

#056370

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #42539d;
/* rgb */ color: rgb(66, 83, 157);
/* oklch */ color: oklch(46.7% 0.121 271.3);

Tailwind

colors: {
  custom: {
    50: '#7e83ba',
    500: '#42539d',
    950: '#000000',
  },
}

SCSS

$custom: #42539d;
$custom-light: #7e83ba;
$custom-dark: #000000;

JSON

{
  "hex": "#42539d",
  "rgb": {
    "r": 66,
    "g": 83,
    "b": 157
  },
  "hsl": {
    "h": 228.791,
    "s": 40.807,
    "l": 43.725
  },
  "oklch": {
    "l": 0.46677,
    "c": 0.12104,
    "h": 271.3
  },
  "luminance": 0.09779
}

Semantic roles & 50–950 ramp

primary

#42539D

secondary

#B9AF82

accent

#BA57D1

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #42539D

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

Preview Lab → · Contrast checker → · Palette generator →