#4042B7#4042B7

#4042B7 is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.3% C 0.180 H 275.7°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#4042B7
RGB	rgb(64, 66, 183)
HSL	hsl(239, 48%, 48%)
HSV	hsv(239, 65%, 72%)
CMYK	cmyk(65%, 63.9%, 0%, 28.2%)
CIE-LAB	lab(34.81, 35.98, -62.19)
CIE-LCH	lch(34.81, 71.85, 300.05°)
OKLab	oklab(45.28% 0.018 -0.1793)
OKLCH	oklch(45.28% 0.18 275.7)
XYZ	xyz(12.6070, 8.4042, 45.7484)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4042B7 #B7B540

analogous

#407DB7 #4042B7 #7940B7

triadic

#4042B7 #B74042 #42B740

tetradic

#4042B7 #B7407D #B7B540 #40B779

square

#4042B7 #B7407D #B7B540 #40B779

split-complementary

#4042B7 #B77940 #7DB740

monochromatic

#20215C #30328A #4042B7 #696BCB #9798DB

Accessibility & contrast

On white

7.83

#4042B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#4042B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4042B7

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4042B7	#FFFFFF	#000000	##FFFFFF
##4042B7	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BB

Deuteranopia (green-blind)

#004DB5

Tritanopia (blue-blind)

#006076

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4042b7;
/* rgb */ color: rgb(64, 66, 183);
/* oklch */ color: oklch(45.3% 0.180 275.7);

Tailwind

colors: {
  custom: {
    50: '#8377ce',
    500: '#4042b7',
    950: '#000000',
  },
}

SCSS

$custom: #4042b7;
$custom-light: #8377ce;
$custom-dark: #000000;

JSON

{
  "hex": "#4042b7",
  "rgb": {
    "r": 64,
    "g": 66,
    "b": 183
  },
  "hsl": {
    "h": 238.992,
    "s": 48.178,
    "l": 48.431
  },
  "oklch": {
    "l": 0.45275,
    "c": 0.18019,
    "h": 275.7
  },
  "luminance": 0.08405
}

Semantic roles & 50–950 ramp

primary

#4042B7

secondary

#C6C58D

accent

#D550D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4042B7

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

Preview Lab → · Contrast checker → · Palette generator →