#4240CC#4240CC

#4240CC is a mid, highly saturated blue. Relative luminance 0.092; OKLCH L 47.0% C 0.209 H 275.4°. Best body text is #FFFFFF at 7.40:1 contrast (WCAG AA passes).

Color values

HEX	#4240CC
RGB	rgb(66, 64, 204)
HSL	hsl(241, 58%, 53%)
HSV	hsv(241, 69%, 80%)
CMYK	cmyk(67.6%, 68.6%, 0%, 20%)
CIE-LAB	lab(36.33, 44.47, -71.99)
CIE-LCH	lch(36.33, 84.62, 301.71°)
OKLab	oklab(46.98% 0.0196 -0.2079)
OKLCH	oklch(46.98% 0.209 275.4)
XYZ	xyz(14.9757, 9.1833, 58.0984)
Luminance	0.0919 (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

#4240CC #CACC40

analogous

#4084CC #4240CC #8840CC

triadic

#4240CC #CC4240 #40CC42

tetradic

#4240CC #CC4084 #CACC40 #40CC88

square

#4240CC #CC4084 #CACC40 #40CC88

split-complementary

#4240CC #CC8840 #84CC40

monochromatic

#201F73 #2D2CA3 #4240CC #7270D9 #A2A1E6

Accessibility & contrast

On white

7.40

#4240CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#4240CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240CC

7.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240CC	#FFFFFF	#000000	##FFFFFF
##4240CC	1.00	7.40	2.84	7.40
#FFFFFF	7.40	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CD0

Deuteranopia (green-blind)

#004FC9

Tritanopia (blue-blind)

#006681

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #4240cc;
/* rgb */ color: rgb(66, 64, 204);
/* oklch */ color: oklch(47.0% 0.209 275.4);

Tailwind

colors: {
  custom: {
    50: '#8876dd',
    500: '#4240cc',
    950: '#000000',
  },
}

SCSS

$custom: #4240cc;
$custom-light: #8876dd;
$custom-dark: #000000;

JSON

{
  "hex": "#4240cc",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 204
  },
  "hsl": {
    "h": 240.857,
    "s": 57.851,
    "l": 52.549
  },
  "oklch": {
    "l": 0.46981,
    "c": 0.20885,
    "h": 275.4
  },
  "luminance": 0.09185
}

Semantic roles & 50–950 ramp

primary

#4240CC

secondary

#D1D295

accent

#E147DF

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #4240CC

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

Preview Lab → · Contrast checker → · Palette generator →