#403F99#403F99

#403F99 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.143 H 278.8°. Best body text is #FFFFFF at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#403F99
RGB	rgb(64, 63, 153)
HSL	hsl(241, 42%, 42%)
HSV	hsv(241, 59%, 60%)
CMYK	cmyk(58.2%, 58.8%, 0%, 40%)
CIE-LAB	lab(31.68, 27.66, -49.31)
CIE-LCH	lch(31.68, 56.54, 299.29°)
OKLab	oklab(42.22% 0.022 -0.1415)
OKLCH	oklch(42.22% 0.143 278.8)
XYZ	xyz(9.6398, 6.9442, 30.9632)
Luminance	0.0694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F99 #98993F

analogous

#3F6B99 #403F99 #6D3F99

triadic

#403F99 #99403F #3F9940

tetradic

#403F99 #993F6B #98993F #3F996D

square

#403F99 #993F6B #98993F #3F996D

split-complementary

#403F99 #996D3F #6B993F

monochromatic

#1C1B42 #2E2D6E #403F99 #5B5ABB #8685CD

Accessibility & contrast

On white

8.79

#403F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#403F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F99

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F99	#FFFFFF	#000000	##FFFFFF
##403F99	1.00	8.79	2.39	8.79
#FFFFFF	8.79	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9C

Deuteranopia (green-blind)

#004797

Tritanopia (blue-blind)

#0C5465

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #403f99;
/* rgb */ color: rgb(64, 63, 153);
/* oklch */ color: oklch(42.2% 0.143 278.8);

Tailwind

colors: {
  custom: {
    50: '#7d74b8',
    500: '#403f99',
    950: '#000000',
  },
}

SCSS

$custom: #403f99;
$custom-light: #7d74b8;
$custom-dark: #000000;

JSON

{
  "hex": "#403f99",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 240.667,
    "s": 41.667,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42221,
    "c": 0.14317,
    "h": 278.8
  },
  "luminance": 0.06945
}

Semantic roles & 50–950 ramp

primary

#403F99

secondary

#B7B77C

accent

#D156D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #403F99

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

Preview Lab → · Contrast checker → · Palette generator →