#40399D#40399D

#40399D is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.157 H 280.2°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#40399D
RGB	rgb(64, 57, 157)
HSL	hsl(244, 47%, 42%)
HSV	hsv(244, 64%, 62%)
CMYK	cmyk(59.2%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(30.52, 32.83, -53.63)
CIE-LCH	lch(30.52, 62.88, 301.47°)
OKLab	oklab(41.47% 0.0278 -0.1542)
OKLCH	oklch(41.47% 0.157 280.2)
XYZ	xyz(9.6614, 6.4499, 32.6276)
Luminance	0.0645 (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

#40399D #969D39

analogous

#39649D #40399D #72399D

triadic

#40399D #9D4039 #399D40

tetradic

#40399D #9D3964 #969D39 #399D72

square

#40399D #9D3964 #969D39 #399D72

split-complementary

#40399D #9D7239 #649D39

monochromatic

#1B1843 #2E2970 #40399D #5A53C0 #8580D1

Accessibility & contrast

On white

9.17

#40399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#40399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40399D

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40399D	#FFFFFF	#000000	##FFFFFF
##40399D	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA0

Deuteranopia (green-blind)

#00449B

Tritanopia (blue-blind)

#035265

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #40399d;
/* rgb */ color: rgb(64, 57, 157);
/* oklch */ color: oklch(41.5% 0.157 280.2);

Tailwind

colors: {
  custom: {
    50: '#7f70bb',
    500: '#40399d',
    950: '#000000',
  },
}

SCSS

$custom: #40399d;
$custom-light: #7f70bb;
$custom-dark: #000000;

JSON

{
  "hex": "#40399d",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 244.2,
    "s": 46.729,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41467,
    "c": 0.15669,
    "h": 280.2
  },
  "luminance": 0.06451
}

Semantic roles & 50–950 ramp

primary

#40399D

secondary

#B6BA78

accent

#D651CD

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #40399D

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

Preview Lab → · Contrast checker → · Palette generator →