#4239E0#4239E0

#4239E0 is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.9% C 0.240 H 274.8°. Best body text is #FFFFFF at 7.26:1 contrast (WCAG AA passes).

Color values

HEX	#4239E0
RGB	rgb(66, 57, 224)
HSL	hsl(243, 73%, 55%)
HSV	hsv(243, 75%, 88%)
CMYK	cmyk(70.5%, 74.6%, 0%, 12.2%)
CIE-LAB	lab(36.86, 54.73, -82.64)
CIE-LCH	lch(36.86, 99.12, 303.52°)
OKLab	oklab(47.94% 0.0202 -0.239)
OKLCH	oklch(47.94% 0.24 274.8)
XYZ	xyz(17.1600, 9.4647, 71.4291)
Luminance	0.0947 (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

#4239E0 #D7E039

analogous

#3983E0 #4239E0 #9639E0

triadic

#4239E0 #E04239 #39E042

tetradic

#4239E0 #E03983 #D7E039 #39E096

square

#4239E0 #E03983 #D7E039 #39E096

split-complementary

#4239E0 #E09639 #83E039

monochromatic

#1C1589 #261EBE #4239E0 #756EE8 #A7A3F1

Accessibility & contrast

On white

7.26

#4239E0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#4239E0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4239E0

7.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4239E0	#FFFFFF	#000000	##FFFFFF
##4239E0	1.00	7.26	2.89	7.26
#FFFFFF	7.26	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EE5

Deuteranopia (green-blind)

#004FDD

Tritanopia (blue-blind)

#006A8A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4239e0;
/* rgb */ color: rgb(66, 57, 224);
/* oklch */ color: oklch(47.9% 0.240 274.8);

Tailwind

colors: {
  custom: {
    50: '#8d72eb',
    500: '#4239e0',
    950: '#000000',
  },
}

SCSS

$custom: #4239e0;
$custom-light: #8d72eb;
$custom-dark: #000000;

JSON

{
  "hex": "#4239e0",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 224
  },
  "hsl": {
    "h": 243.234,
    "s": 72.926,
    "l": 55.098
  },
  "oklch": {
    "l": 0.47935,
    "c": 0.23982,
    "h": 274.8
  },
  "luminance": 0.09466
}

Semantic roles & 50–950 ramp

primary

#4239E0

secondary

#DADD97

accent

#F038E6

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0816

muted

#7E7B84

Preview Lab

Preview with #4239E0

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

Preview Lab → · Contrast checker → · Palette generator →