#4042E3#4042E3

#4042E3 is a mid, highly saturated blue. Relative luminance 0.105; OKLCH L 49.4% C 0.235 H 273.1°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#4042E3
RGB	rgb(64, 66, 227)
HSL	hsl(239, 74%, 57%)
HSV	hsv(239, 72%, 89%)
CMYK	cmyk(71.8%, 70.9%, 0%, 11%)
CIE-LAB	lab(38.78, 50.61, -81.19)
CIE-LCH	lch(38.78, 95.67, 301.94°)
OKLab	oklab(49.35% 0.0129 -0.2349)
OKLCH	oklch(49.35% 0.235 273.1)
XYZ	xyz(17.9231, 10.5307, 73.7462)
Luminance	0.1053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 4.44

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4042E3 #E3E140

analogous

#4093E3 #4042E3 #9040E3

triadic

#4042E3 #E34042 #42E340

tetradic

#4042E3 #E34093 #E3E140 #40E390

square

#4042E3 #E34093 #E3E140 #40E390

split-complementary

#4042E3 #E39040 #93E340

monochromatic

#161793 #1D1FC8 #4042E3 #7577EB #ABACF3

Accessibility & contrast

On white

6.76

#4042E3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#4042E3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4042E3

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4042E3	#FFFFFF	#000000	##FFFFFF
##4042E3	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E8

Deuteranopia (green-blind)

#0053E0

Tritanopia (blue-blind)

#006F8E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4042e3;
/* rgb */ color: rgb(64, 66, 227);
/* oklch */ color: oklch(49.4% 0.235 273.1);

Tailwind

colors: {
  custom: {
    50: '#8c78ed',
    500: '#4042e3',
    950: '#000000',
  },
}

SCSS

$custom: #4042e3;
$custom-light: #8c78ed;
$custom-dark: #000000;

JSON

{
  "hex": "#4042e3",
  "rgb": {
    "r": 64,
    "g": 66,
    "b": 227
  },
  "hsl": {
    "h": 239.264,
    "s": 74.429,
    "l": 57.059
  },
  "oklch": {
    "l": 0.49352,
    "c": 0.23522,
    "h": 273.1
  },
  "luminance": 0.10532
}

Semantic roles & 50–950 ramp

primary

#4042E3

secondary

#E1E09E

accent

#EF37F1

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #4042E3

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

Preview Lab → · Contrast checker → · Palette generator →