#4243B5#4243B5

#4243B5 is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.4% C 0.176 H 276.4°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#4243B5
RGB	rgb(66, 67, 181)
HSL	hsl(239, 47%, 48%)
HSV	hsv(239, 64%, 71%)
CMYK	cmyk(63.5%, 63%, 0%, 29%)
CIE-LAB	lab(35.02, 34.98, -60.66)
CIE-LCH	lch(35.02, 70.03, 299.97°)
OKLab	oklab(45.41% 0.0197 -0.1747)
OKLCH	oklch(45.41% 0.176 276.4)
XYZ	xyz(12.5917, 8.5077, 44.6857)
Luminance	0.0851 (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

#4243B5 #B5B442

analogous

#427CB5 #4243B5 #7A42B5

triadic

#4243B5 #B54243 #43B542

tetradic

#4243B5 #B5427C #B5B442 #42B57A

square

#4243B5 #B5427C #B5B442 #42B57A

split-complementary

#4243B5 #B57A42 #7CB542

monochromatic

#21225B #323288 #4243B5 #6B6CC9 #9899D9

Accessibility & contrast

On white

7.77

#4243B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#4243B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243B5

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243B5	#FFFFFF	#000000	##FFFFFF
##4243B5	1.00	7.77	2.70	7.77
#FFFFFF	7.77	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B9

Deuteranopia (green-blind)

#004DB3

Tritanopia (blue-blind)

#006075

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4243b5;
/* rgb */ color: rgb(66, 67, 181);
/* oklch */ color: oklch(45.4% 0.176 276.4);

Tailwind

colors: {
  custom: {
    50: '#8377cc',
    500: '#4243b5',
    950: '#000000',
  },
}

SCSS

$custom: #4243b5;
$custom-light: #8377cc;
$custom-dark: #000000;

JSON

{
  "hex": "#4243b5",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 181
  },
  "hsl": {
    "h": 239.478,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.45411,
    "c": 0.17585,
    "h": 276.4
  },
  "luminance": 0.08509
}

Semantic roles & 50–950 ramp

primary

#4243B5

secondary

#C5C58E

accent

#D552D6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4243B5

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

Preview Lab → · Contrast checker → · Palette generator →