#4040B4#4040B4

#4040B4 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.7% C 0.179 H 276.4°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#4040B4
RGB	rgb(64, 64, 180)
HSL	hsl(240, 48%, 48%)
HSV	hsv(240, 64%, 71%)
CMYK	cmyk(64.4%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(34.09, 36.20, -61.60)
CIE-LCH	lch(34.09, 71.45, 300.44°)
OKLab	oklab(44.67% 0.0198 -0.1776)
OKLCH	oklch(44.67% 0.179 276.4)
XYZ	xyz(12.1833, 8.0511, 44.0831)
Luminance	0.0805 (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

#4040B4 #B4B440

analogous

#407AB4 #4040B4 #7A40B4

triadic

#4040B4 #B44040 #40B440

tetradic

#4040B4 #B4407A #B4B440 #40B47A

square

#4040B4 #B4407A #B4B440 #40B47A

split-complementary

#4040B4 #B47A40 #7AB440

monochromatic

#20205A #303087 #4040B4 #6868C9 #9595D9

Accessibility & contrast

On white

8.04

#4040B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#4040B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040B4

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040B4	#FFFFFF	#000000	##FFFFFF
##4040B4	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#004BB2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #4040b4;
/* rgb */ color: rgb(64, 64, 180);
/* oklch */ color: oklch(44.7% 0.179 276.4);

Tailwind

colors: {
  custom: {
    50: '#8275cb',
    500: '#4040b4',
    950: '#000000',
  },
}

SCSS

$custom: #4040b4;
$custom-light: #8275cb;
$custom-dark: #000000;

JSON

{
  "hex": "#4040b4",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 240,
    "s": 47.541,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44669,
    "c": 0.17866,
    "h": 276.4
  },
  "luminance": 0.08052
}

Semantic roles & 50–950 ramp

primary

#4040B4

secondary

#C5C58B

accent

#D751D7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4040B4

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

Preview Lab → · Contrast checker → · Palette generator →