#4240AF#4240AF

#4240AF is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.172 H 277.6°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#4240AF
RGB	rgb(66, 64, 175)
HSL	hsl(241, 46%, 47%)
HSV	hsv(241, 63%, 69%)
CMYK	cmyk(62.3%, 63.4%, 0%, 31.4%)
CIE-LAB	lab(33.81, 34.82, -59.07)
CIE-LCH	lch(33.81, 68.57, 300.52°)
OKLab	oklab(44.38% 0.0227 -0.1701)
OKLCH	oklch(44.38% 0.172 277.6)
XYZ	xyz(11.8155, 7.9193, 41.4551)
Luminance	0.0792 (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

#4240AF #ADAF40

analogous

#4076AF #4240AF #7A40AF

triadic

#4240AF #AF4240 #40AF42

tetradic

#4240AF #AF4076 #ADAF40 #40AF7A

square

#4240AF #AF4076 #ADAF40 #40AF7A

split-complementary

#4240AF #AF7A40 #76AF40

monochromatic

#201F55 #313082 #4240AF #6765C7 #9392D7

Accessibility & contrast

On white

8.13

#4240AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#4240AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240AF

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240AF	#FFFFFF	#000000	##FFFFFF
##4240AF	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B3

Deuteranopia (green-blind)

#004BAD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #4240af;
/* rgb */ color: rgb(66, 64, 175);
/* oklch */ color: oklch(44.4% 0.172 277.6);

Tailwind

colors: {
  custom: {
    50: '#8275c8',
    500: '#4240af',
    950: '#000000',
  },
}

SCSS

$custom: #4240af;
$custom-light: #8275c8;
$custom-dark: #000000;

JSON

{
  "hex": "#4240af",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 175
  },
  "hsl": {
    "h": 241.081,
    "s": 46.444,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44376,
    "c": 0.17159,
    "h": 277.6
  },
  "luminance": 0.0792
}

Semantic roles & 50–950 ramp

primary

#4240AF

secondary

#C1C388

accent

#D652D4

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4240AF

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

Preview Lab → · Contrast checker → · Palette generator →