#403F9D#403F9D

#403F9D is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.149 H 278.5°. Best body text is #FFFFFF at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#403F9D
RGB	rgb(64, 63, 157)
HSL	hsl(241, 43%, 43%)
HSV	hsv(241, 60%, 62%)
CMYK	cmyk(59.2%, 59.9%, 0%, 38.4%)
CIE-LAB	lab(31.99, 29.02, -51.25)
CIE-LCH	lch(31.99, 58.89, 299.52°)
OKLab	oklab(42.54% 0.0219 -0.1472)
OKLCH	oklch(42.54% 0.149 278.5)
XYZ	xyz(9.9757, 7.0786, 32.7324)
Luminance	0.0708 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.85

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F9D #9C9D3F

analogous

#3F6D9D #403F9D #6F3F9D

triadic

#403F9D #9D403F #3F9D40

tetradic

#403F9D #9D3F6D #9C9D3F #3F9D6F

square

#403F9D #9D3F6D #9C9D3F #3F9D6F

split-complementary

#403F9D #9D6F3F #6D9D3F

monochromatic

#1C1C46 #2E2D71 #403F9D #5D5CBD #8887CF

Accessibility & contrast

On white

8.69

#403F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#403F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F9D

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F9D	#FFFFFF	#000000	##FFFFFF
##403F9D	1.00	8.69	2.42	8.69
#FFFFFF	8.69	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA0

Deuteranopia (green-blind)

#00479B

Tritanopia (blue-blind)

#015668

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #403f9d;
/* rgb */ color: rgb(64, 63, 157);
/* oklch */ color: oklch(42.5% 0.149 278.5);

Tailwind

colors: {
  custom: {
    50: '#7e74bb',
    500: '#403f9d',
    950: '#000000',
  },
}

SCSS

$custom: #403f9d;
$custom-light: #7e74bb;
$custom-dark: #000000;

JSON

{
  "hex": "#403f9d",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 157
  },
  "hsl": {
    "h": 240.638,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42543,
    "c": 0.14878,
    "h": 278.5
  },
  "luminance": 0.07079
}

Semantic roles & 50–950 ramp

primary

#403F9D

secondary

#B9BA7E

accent

#D355D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403F9D

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

Preview Lab → · Contrast checker → · Palette generator →