#42539A#42539A

#42539A is a mid, moderate blue. Relative luminance 0.097; OKLCH L 46.5% C 0.117 H 271.1°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#42539A
RGB	rgb(66, 83, 154)
HSL	hsl(228, 40%, 43%)
HSV	hsv(228, 57%, 60%)
CMYK	cmyk(57.1%, 46.1%, 0%, 39.6%)
CIE-LAB	lab(37.26, 15.36, -40.94)
CIE-LCH	lch(37.26, 43.72, 290.57°)
OKLab	oklab(46.48% 0.0023 -0.1166)
OKLCH	oklch(46.48% 0.117 271.1)
XYZ	xyz(11.1708, 9.6770, 31.8448)
Luminance	0.0968 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42539A #9A8942

analogous

#427F9A #42539A #5D429A

triadic

#42539A #9A4253 #539A42

tetradic

#42539A #9A427F #9A8942 #429A5D

square

#42539A #9A427F #9A8942 #429A5D

split-complementary

#42539A #9A5D42 #7F9A42

monochromatic

#1D2544 #303C6F #42539A #5F71BA #8A97CD

Accessibility & contrast

On white

7.15

#42539A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#42539A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42539A

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42539A	#FFFFFF	#000000	##FFFFFF
##42539A	1.00	7.15	2.94	7.15
#FFFFFF	7.15	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#335C9D

Deuteranopia (green-blind)

#285498

Tritanopia (blue-blind)

#0D636F

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #42539a;
/* rgb */ color: rgb(66, 83, 154);
/* oklch */ color: oklch(46.5% 0.117 271.1);

Tailwind

colors: {
  custom: {
    50: '#7e83b8',
    500: '#42539a',
    950: '#000000',
  },
}

SCSS

$custom: #42539a;
$custom-light: #7e83b8;
$custom-dark: #000000;

JSON

{
  "hex": "#42539a",
  "rgb": {
    "r": 66,
    "g": 83,
    "b": 154
  },
  "hsl": {
    "h": 228.409,
    "s": 40,
    "l": 43.137
  },
  "oklch": {
    "l": 0.46476,
    "c": 0.11661,
    "h": 271.1
  },
  "luminance": 0.09678
}

Semantic roles & 50–950 ramp

primary

#42539A

secondary

#B8AD80

accent

#B958D0

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #42539A

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

Preview Lab → · Contrast checker → · Palette generator →