#403F9A#403F9A

#403F9A is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.3% C 0.145 H 278.7°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#403F9A
RGB	rgb(64, 63, 154)
HSL	hsl(241, 42%, 43%)
HSV	hsv(241, 59%, 60%)
CMYK	cmyk(58.4%, 59.1%, 0%, 39.6%)
CIE-LAB	lab(31.76, 28.00, -49.80)
CIE-LCH	lch(31.76, 57.13, 299.35°)
OKLab	oklab(42.3% 0.022 -0.1429)
OKLCH	oklch(42.3% 0.145 278.7)
XYZ	xyz(9.7227, 6.9774, 31.4000)
Luminance	0.0698 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 7.28

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F9A #999A3F

analogous

#3F6C9A #403F9A #6D3F9A

triadic

#403F9A #9A403F #3F9A40

tetradic

#403F9A #9A3F6C #999A3F #3F9A6D

square

#403F9A #9A3F6C #999A3F #3F9A6D

split-complementary

#403F9A #9A6D3F #6C9A3F

monochromatic

#1C1B43 #2E2D6F #403F9A #5C5ABC #8786CD

Accessibility & contrast

On white

8.77

#403F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#403F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F9A

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F9A	#FFFFFF	#000000	##FFFFFF
##403F9A	1.00	8.77	2.40	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9D

Deuteranopia (green-blind)

#004798

Tritanopia (blue-blind)

#095566

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #403f9a;
/* rgb */ color: rgb(64, 63, 154);
/* oklch */ color: oklch(42.3% 0.145 278.7);

Tailwind

colors: {
  custom: {
    50: '#7e74b8',
    500: '#403f9a',
    950: '#000000',
  },
}

SCSS

$custom: #403f9a;
$custom-light: #7e74b8;
$custom-dark: #000000;

JSON

{
  "hex": "#403f9a",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 154
  },
  "hsl": {
    "h": 240.659,
    "s": 41.935,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42301,
    "c": 0.14458,
    "h": 278.7
  },
  "luminance": 0.06978
}

Semantic roles & 50–950 ramp

primary

#403F9A

secondary

#B7B87D

accent

#D256D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0811

muted

#7C7B80

Preview Lab

Preview with #403F9A

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

Preview Lab → · Contrast checker → · Palette generator →