#4240CB#4240CB

#4240CB is a mid, highly saturated blue. Relative luminance 0.091; OKLCH L 46.9% C 0.208 H 275.5°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#4240CB
RGB	rgb(66, 64, 203)
HSL	hsl(241, 57%, 52%)
HSV	hsv(241, 68%, 80%)
CMYK	cmyk(67.5%, 68.5%, 0%, 20.4%)
CIE-LAB	lab(36.24, 44.15, -71.55)
CIE-LCH	lch(36.24, 84.08, 301.67°)
OKLab	oklab(46.89% 0.0198 -0.2067)
OKLCH	oklch(46.89% 0.208 275.5)
XYZ	xyz(14.8561, 9.1355, 57.4688)
Luminance	0.0914 (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

#4240CB #C9CB40

analogous

#4084CB #4240CB #8740CB

triadic

#4240CB #CB4240 #40CB42

tetradic

#4240CB #CB4084 #C9CB40 #40CB87

square

#4240CB #CB4084 #C9CB40 #40CB87

split-complementary

#4240CB #CB8740 #84CB40

monochromatic

#201F72 #2E2CA2 #4240CB #7270D8 #A1A0E5

Accessibility & contrast

On white

7.43

#4240CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#4240CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240CB

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240CB	#FFFFFF	#000000	##FFFFFF
##4240CB	1.00	7.43	2.83	7.43
#FFFFFF	7.43	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BCF

Deuteranopia (green-blind)

#004FC8

Tritanopia (blue-blind)

#006680

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #4240cb;
/* rgb */ color: rgb(66, 64, 203);
/* oklch */ color: oklch(46.9% 0.208 275.5);

Tailwind

colors: {
  custom: {
    50: '#8876dc',
    500: '#4240cb',
    950: '#000000',
  },
}

SCSS

$custom: #4240cb;
$custom-light: #8876dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4240cb",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 203
  },
  "hsl": {
    "h": 240.863,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.46887,
    "c": 0.20761,
    "h": 275.5
  },
  "luminance": 0.09137
}

Semantic roles & 50–950 ramp

primary

#4240CB

secondary

#D1D295

accent

#E047DE

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #4240CB

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

Preview Lab → · Contrast checker → · Palette generator →