#4240BB#4240BB

#4240BB is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.4% C 0.187 H 276.6°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#4240BB
RGB	rgb(66, 64, 187)
HSL	hsl(241, 49%, 49%)
HSV	hsv(241, 66%, 73%)
CMYK	cmyk(64.7%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.83, 38.85, -64.52)
CIE-LCH	lch(34.83, 75.31, 301.05°)
OKLab	oklab(45.43% 0.0216 -0.1861)
OKLCH	oklch(45.43% 0.187 276.6)
XYZ	xyz(13.0469, 8.4118, 47.9402)
Luminance	0.0841 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.04

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4240BB #B9BB40

analogous

#407BBB #4240BB #8040BB

triadic

#4240BB #BB4240 #40BB42

tetradic

#4240BB #BB407B #B9BB40 #40BB80

square

#4240BB #BB407B #B9BB40 #40BB80

split-complementary

#4240BB #BB8040 #7BBB40

monochromatic

#222160 #32308D #4240BB #6D6CCD #9A99DC

Accessibility & contrast

On white

7.83

#4240BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#4240BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240BB

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240BB	#FFFFFF	#000000	##FFFFFF
##4240BB	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004DB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4240bb;
/* rgb */ color: rgb(66, 64, 187);
/* oklch */ color: oklch(45.4% 0.187 276.6);

Tailwind

colors: {
  custom: {
    50: '#8575d0',
    500: '#4240bb',
    950: '#000000',
  },
}

SCSS

$custom: #4240bb;
$custom-light: #8575d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4240bb",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 240.976,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.45427,
    "c": 0.18733,
    "h": 276.6
  },
  "luminance": 0.08413
}

Semantic roles & 50–950 ramp

primary

#4240BB

secondary

#C7C88F

accent

#D94FD6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4240BB

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

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