#4239B8#4239B8

#4239B8 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 44.0% C 0.192 H 278.2°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#4239B8
RGB	rgb(66, 57, 184)
HSL	hsl(244, 53%, 47%)
HSV	hsv(244, 69%, 72%)
CMYK	cmyk(64.1%, 69%, 0%, 27.8%)
CIE-LAB	lab(33.02, 42.04, -65.72)
CIE-LCH	lch(33.02, 78.01, 302.61°)
OKLab	oklab(44.04% 0.0273 -0.1896)
OKLCH	oklch(44.04% 0.192 278.2)
XYZ	xyz(12.3588, 7.5442, 46.1430)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.84

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4239B8 #AFB839

analogous

#3970B8 #4239B8 #8239B8

triadic

#4239B8 #B84239 #39B842

tetradic

#4239B8 #B83970 #AFB839 #39B882

square

#4239B8 #B83970 #AFB839 #39B882

split-complementary

#4239B8 #B88239 #70B839

monochromatic

#201C5B #312B89 #4239B8 #6860CE #958FDC

Accessibility & contrast

On white

8.37

#4239B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#4239B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4239B8

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4239B8	#FFFFFF	#000000	##FFFFFF
##4239B8	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BC

Deuteranopia (green-blind)

#0048B6

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4239b8;
/* rgb */ color: rgb(66, 57, 184);
/* oklch */ color: oklch(44.0% 0.192 278.2);

Tailwind

colors: {
  custom: {
    50: '#8571ce',
    500: '#4239b8',
    950: '#000000',
  },
}

SCSS

$custom: #4239b8;
$custom-light: #8571ce;
$custom-dark: #000000;

JSON

{
  "hex": "#4239b8",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 184
  },
  "hsl": {
    "h": 244.252,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44036,
    "c": 0.19155,
    "h": 278.2
  },
  "luminance": 0.07545
}

Semantic roles & 50–950 ramp

primary

#4239B8

secondary

#C2C786

accent

#DC4CD2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4239B8

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

Preview Lab → · Contrast checker → · Palette generator →