#4042CB#4042CB

#4042CB is a mid, highly saturated blue. Relative luminance 0.093; OKLCH L 47.1% C 0.206 H 274.5°. Best body text is #FFFFFF at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#4042CB
RGB	rgb(64, 66, 203)
HSL	hsl(239, 57%, 52%)
HSV	hsv(239, 68%, 80%)
CMYK	cmyk(68.5%, 67.5%, 0%, 20.4%)
CIE-LAB	lab(36.55, 42.72, -71.06)
CIE-LCH	lch(36.55, 82.91, 301.02°)
OKLab	oklab(47.07% 0.0161 -0.2053)
OKLCH	oklch(47.07% 0.206 274.5)
XYZ	xyz(14.8385, 9.2968, 57.5008)
Luminance	0.0930 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.96

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4042CB #CBC940

analogous

#4087CB #4042CB #8440CB

triadic

#4042CB #CB4042 #42CB40

tetradic

#4042CB #CB4087 #CBC940 #40CB84

square

#4042CB #CB4087 #CBC940 #40CB84

split-complementary

#4042CB #CB8440 #87CB40

monochromatic

#1F2072 #2C2EA2 #4042CB #7072D8 #A0A1E5

Accessibility & contrast

On white

7.34

#4042CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#4042CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4042CB

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4042CB	#FFFFFF	#000000	##FFFFFF
##4042CB	1.00	7.34	2.86	7.34
#FFFFFF	7.34	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCF

Deuteranopia (green-blind)

#0050C8

Tritanopia (blue-blind)

#006781

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #4042cb;
/* rgb */ color: rgb(64, 66, 203);
/* oklch */ color: oklch(47.1% 0.206 274.5);

Tailwind

colors: {
  custom: {
    50: '#8777dc',
    500: '#4042cb',
    950: '#000000',
  },
}

SCSS

$custom: #4042cb;
$custom-light: #8777dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4042cb",
  "rgb": {
    "r": 64,
    "g": 66,
    "b": 203
  },
  "hsl": {
    "h": 239.137,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.47074,
    "c": 0.2059,
    "h": 274.5
  },
  "luminance": 0.09298
}

Semantic roles & 50–950 ramp

primary

#4042CB

secondary

#D2D195

accent

#DE47E0

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4042CB

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

Preview Lab → · Contrast checker → · Palette generator →