#4042E4#4042E4

#4042E4 is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.4% C 0.236 H 273.1°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#4042E4
RGB	rgb(64, 66, 228)
HSL	hsl(239, 75%, 57%)
HSV	hsv(239, 72%, 89%)
CMYK	cmyk(71.9%, 71.1%, 0%, 10.6%)
CIE-LAB	lab(38.87, 50.93, -81.61)
CIE-LCH	lch(38.87, 96.20, 301.97°)
OKLab	oklab(49.45% 0.0127 -0.2361)
OKLCH	oklch(49.45% 0.236 273.1)
XYZ	xyz(18.0615, 10.5860, 74.4752)
Luminance	0.1059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4042E4 #E4E240

analogous

#4094E4 #4042E4 #9040E4

triadic

#4042E4 #E44042 #42E440

tetradic

#4042E4 #E44094 #E4E240 #40E490

square

#4042E4 #E44094 #E4E240 #40E490

split-complementary

#4042E4 #E49040 #94E440

monochromatic

#151795 #1D1FCA #4042E4 #7677EC #ABACF3

Accessibility & contrast

On white

6.74

#4042E4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#4042E4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4042E4

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4042E4	#FFFFFF	#000000	##FFFFFF
##4042E4	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E9

Deuteranopia (green-blind)

#0054E1

Tritanopia (blue-blind)

#00708F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4042e4;
/* rgb */ color: rgb(64, 66, 228);
/* oklch */ color: oklch(49.4% 0.236 273.1);

Tailwind

colors: {
  custom: {
    50: '#8c78ee',
    500: '#4042e4',
    950: '#000000',
  },
}

SCSS

$custom: #4042e4;
$custom-light: #8c78ee;
$custom-dark: #000000;

JSON

{
  "hex": "#4042e4",
  "rgb": {
    "r": 64,
    "g": 66,
    "b": 228
  },
  "hsl": {
    "h": 239.268,
    "s": 75.229,
    "l": 57.255
  },
  "oklch": {
    "l": 0.49449,
    "c": 0.23641,
    "h": 273.1
  },
  "luminance": 0.10588
}

Semantic roles & 50–950 ramp

primary

#4042E4

secondary

#E1E09F

accent

#F036F2

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0917

muted

#7E7B85

Preview Lab

Preview with #4042E4

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

Preview Lab → · Contrast checker → · Palette generator →