#42539B#42539B

#42539B is a mid, moderate blue. Relative luminance 0.097; OKLCH L 46.5% C 0.118 H 271.2°. Best body text is #FFFFFF at 7.14:1 contrast (WCAG AA passes).

Color values

HEX	#42539B
RGB	rgb(66, 83, 155)
HSL	hsl(229, 40%, 43%)
HSV	hsv(229, 57%, 61%)
CMYK	cmyk(57.4%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(37.32, 15.71, -41.44)
CIE-LCH	lch(37.32, 44.32, 290.76°)
OKLab	oklab(46.54% 0.0024 -0.1181)
OKLCH	oklch(46.54% 0.118 271.2)
XYZ	xyz(11.2545, 9.7105, 32.2852)
Luminance	0.0971 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42539B #9B8A42

analogous

#427F9B #42539B #5D429B

triadic

#42539B #9B4253 #539B42

tetradic

#42539B #9B427F #9B8A42 #429B5D

square

#42539B #9B427F #9B8A42 #429B5D

split-complementary

#42539B #9B5D42 #7F9B42

monochromatic

#1D2545 #303C70 #42539B #5F71BB #8A97CD

Accessibility & contrast

On white

7.14

#42539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#42539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42539B

7.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42539B	#FFFFFF	#000000	##FFFFFF
##42539B	1.00	7.14	2.94	7.14
#FFFFFF	7.14	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#325C9E

Deuteranopia (green-blind)

#265499

Tritanopia (blue-blind)

#0A636F

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #42539b;
/* rgb */ color: rgb(66, 83, 155);
/* oklch */ color: oklch(46.5% 0.118 271.2);

Tailwind

colors: {
  custom: {
    50: '#7e83b9',
    500: '#42539b',
    950: '#000000',
  },
}

SCSS

$custom: #42539b;
$custom-light: #7e83b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42539b",
  "rgb": {
    "r": 66,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 228.539,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.46543,
    "c": 0.1181,
    "h": 271.2
  },
  "luminance": 0.09711
}

Semantic roles & 50–950 ramp

primary

#42539B

secondary

#B8AE81

accent

#B958D0

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #42539B

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

Preview Lab → · Contrast checker → · Palette generator →