#4239B1#4239B1

#4239B1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.4% C 0.183 H 278.9°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#4239B1
RGB	rgb(66, 57, 177)
HSL	hsl(245, 51%, 46%)
HSV	hsv(245, 68%, 69%)
CMYK	cmyk(62.7%, 67.8%, 0%, 30.6%)
CIE-LAB	lab(32.39, 39.76, -62.59)
CIE-LCH	lch(32.39, 74.15, 302.42°)
OKLab	oklab(43.39% 0.0283 -0.1804)
OKLCH	oklch(43.39% 0.183 278.9)
XYZ	xyz(11.6432, 7.2579, 42.3738)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.90

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4239B1 #A8B139

analogous

#396CB1 #4239B1 #7E39B1

triadic

#4239B1 #B14239 #39B142

tetradic

#4239B1 #B1396C #A8B139 #39B17E

square

#4239B1 #B1396C #A8B139 #39B17E

split-complementary

#4239B1 #B17E39 #6CB139

monochromatic

#1F1B54 #312A83 #4239B1 #655DCB #918BDA

Accessibility & contrast

On white

8.57

#4239B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#4239B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4239B1

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4239B1	#FFFFFF	#000000	##FFFFFF
##4239B1	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4239b1;
/* rgb */ color: rgb(66, 57, 177);
/* oklch */ color: oklch(43.4% 0.183 278.9);

Tailwind

colors: {
  custom: {
    50: '#8370c9',
    500: '#4239b1',
    950: '#000000',
  },
}

SCSS

$custom: #4239b1;
$custom-light: #8370c9;
$custom-dark: #000000;

JSON

{
  "hex": "#4239b1",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 177
  },
  "hsl": {
    "h": 244.5,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43391,
    "c": 0.18265,
    "h": 278.9
  },
  "luminance": 0.07259
}

Semantic roles & 50–950 ramp

primary

#4239B1

secondary

#BFC482

accent

#DB4DD0

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #4239B1

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

Preview Lab → · Contrast checker → · Palette generator →