#4040AB#4040AB

#4040AB is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.167 H 277.0°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#4040AB
RGB	rgb(64, 64, 171)
HSL	hsl(240, 46%, 46%)
HSV	hsv(240, 63%, 67%)
CMYK	cmyk(62.6%, 62.6%, 0%, 32.9%)
CIE-LAB	lab(33.34, 33.15, -57.46)
CIE-LCH	lch(33.34, 66.34, 299.98°)
OKLab	oklab(43.89% 0.0204 -0.1654)
OKLCH	oklch(43.89% 0.167 277)
XYZ	xyz(11.2961, 7.6962, 39.4104)
Luminance	0.0770 (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

#4040AB #ABAB40

analogous

#4075AB #4040AB #7540AB

triadic

#4040AB #AB4040 #40AB40

tetradic

#4040AB #AB4075 #ABAB40 #40AB75

square

#4040AB #AB4075 #ABAB40 #40AB75

split-complementary

#4040AB #AB7540 #75AB40

monochromatic

#1F1F52 #2F2F7E #4040AB #6363C5 #9090D5

Accessibility & contrast

On white

8.27

#4040AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#4040AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040AB

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040AB	#FFFFFF	#000000	##FFFFFF
##4040AB	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AE

Deuteranopia (green-blind)

#004AA9

Tritanopia (blue-blind)

#005B6F

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4040ab;
/* rgb */ color: rgb(64, 64, 171);
/* oklch */ color: oklch(43.9% 0.167 277.0);

Tailwind

colors: {
  custom: {
    50: '#8175c5',
    500: '#4040ab',
    950: '#000000',
  },
}

SCSS

$custom: #4040ab;
$custom-light: #8175c5;
$custom-dark: #000000;

JSON

{
  "hex": "#4040ab",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 171
  },
  "hsl": {
    "h": 240,
    "s": 45.532,
    "l": 46.078
  },
  "oklch": {
    "l": 0.4389,
    "c": 0.16668,
    "h": 277
  },
  "luminance": 0.07697
}

Semantic roles & 50–950 ramp

primary

#4040AB

secondary

#C1C186

accent

#D553D5

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #4040AB

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

Preview Lab → · Contrast checker → · Palette generator →