#4239B5#4239B5

#4239B5 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.8% C 0.188 H 278.5°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#4239B5
RGB	rgb(66, 57, 181)
HSL	hsl(244, 52%, 47%)
HSV	hsv(244, 69%, 71%)
CMYK	cmyk(63.5%, 68.5%, 0%, 29%)
CIE-LAB	lab(32.74, 41.06, -64.39)
CIE-LCH	lch(32.74, 76.36, 302.53°)
OKLab	oklab(43.76% 0.0278 -0.1857)
OKLCH	oklch(43.76% 0.188 278.5)
XYZ	xyz(12.0477, 7.4197, 44.5044)
Luminance	0.0742 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.83

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4239B5 #ACB539

analogous

#396EB5 #4239B5 #8039B5

triadic

#4239B5 #B54239 #39B542

tetradic

#4239B5 #B5396E #ACB539 #39B580

square

#4239B5 #B5396E #ACB539 #39B580

split-complementary

#4239B5 #B58039 #6EB539

monochromatic

#201C58 #312A86 #4239B5 #675FCD #938DDB

Accessibility & contrast

On white

8.45

#4239B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#4239B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4239B5

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4239B5	#FFFFFF	#000000	##FFFFFF
##4239B5	1.00	8.45	2.48	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4239b5;
/* rgb */ color: rgb(66, 57, 181);
/* oklch */ color: oklch(43.8% 0.188 278.5);

Tailwind

colors: {
  custom: {
    50: '#8470cc',
    500: '#4239b5',
    950: '#000000',
  },
}

SCSS

$custom: #4239b5;
$custom-light: #8470cc;
$custom-dark: #000000;

JSON

{
  "hex": "#4239b5",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 181
  },
  "hsl": {
    "h": 244.355,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43758,
    "c": 0.18775,
    "h": 278.5
  },
  "luminance": 0.07421
}

Semantic roles & 50–950 ramp

primary

#4239B5

secondary

#C1C684

accent

#DC4CD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4239B5

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

Preview Lab → · Contrast checker → · Palette generator →