#4240B2#4240B2

#4240B2 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.176 H 277.3°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#4240B2
RGB	rgb(66, 64, 178)
HSL	hsl(241, 47%, 47%)
HSV	hsv(241, 64%, 70%)
CMYK	cmyk(62.9%, 64%, 0%, 30.2%)
CIE-LAB	lab(34.06, 35.83, -60.45)
CIE-LCH	lch(34.06, 70.27, 300.66°)
OKLab	oklab(44.64% 0.0224 -0.1741)
OKLCH	oklch(44.64% 0.176 277.3)
XYZ	xyz(12.1134, 8.0384, 43.0241)
Luminance	0.0804 (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

#4240B2 #B0B240

analogous

#4077B2 #4240B2 #7B40B2

triadic

#4240B2 #B24240 #40B242

tetradic

#4240B2 #B24077 #B0B240 #40B27B

square

#4240B2 #B24077 #B0B240 #40B27B

split-complementary

#4240B2 #B27B40 #77B240

monochromatic

#212058 #313085 #4240B2 #6967C8 #9594D8

Accessibility & contrast

On white

8.05

#4240B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#4240B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240B2

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240B2	#FFFFFF	#000000	##FFFFFF
##4240B2	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B6

Deuteranopia (green-blind)

#004BB0

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #4240b2;
/* rgb */ color: rgb(66, 64, 178);
/* oklch */ color: oklch(44.6% 0.176 277.3);

Tailwind

colors: {
  custom: {
    50: '#8375ca',
    500: '#4240b2',
    950: '#000000',
  },
}

SCSS

$custom: #4240b2;
$custom-light: #8375ca;
$custom-dark: #000000;

JSON

{
  "hex": "#4240b2",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 178
  },
  "hsl": {
    "h": 241.053,
    "s": 47.107,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44635,
    "c": 0.17557,
    "h": 277.3
  },
  "luminance": 0.08039
}

Semantic roles & 50–950 ramp

primary

#4240B2

secondary

#C3C48A

accent

#D751D4

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4240B2

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

Preview Lab → · Contrast checker → · Palette generator →