#403F9E#403F9E

#403F9E is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.150 H 278.4°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#403F9E
RGB	rgb(64, 63, 158)
HSL	hsl(241, 43%, 43%)
HSV	hsv(241, 60%, 62%)
CMYK	cmyk(59.5%, 60.1%, 0%, 38%)
CIE-LAB	lab(32.06, 29.36, -51.73)
CIE-LCH	lch(32.06, 59.48, 299.58°)
OKLab	oklab(42.63% 0.0219 -0.1486)
OKLCH	oklch(42.63% 0.15 278.4)
XYZ	xyz(10.0614, 7.1129, 33.1839)
Luminance	0.0711 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F9E #9D9E3F

analogous

#3F6D9E #403F9E #6F3F9E

triadic

#403F9E #9E403F #3F9E40

tetradic

#403F9E #9E3F6D #9D9E3F #3F9E6F

square

#403F9E #9E3F6D #9D9E3F #3F9E6F

split-complementary

#403F9E #9E6F3F #6D9E3F

monochromatic

#1D1C46 #2E2E72 #403F9E #5D5CBE #8988D0

Accessibility & contrast

On white

8.67

#403F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#403F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F9E

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F9E	#FFFFFF	#000000	##FFFFFF
##403F9E	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA1

Deuteranopia (green-blind)

#00489C

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #403f9e;
/* rgb */ color: rgb(64, 63, 158);
/* oklch */ color: oklch(42.6% 0.150 278.4);

Tailwind

colors: {
  custom: {
    50: '#7e74bb',
    500: '#403f9e',
    950: '#000000',
  },
}

SCSS

$custom: #403f9e;
$custom-light: #7e74bb;
$custom-dark: #000000;

JSON

{
  "hex": "#403f9e",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 158
  },
  "hsl": {
    "h": 240.632,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42625,
    "c": 0.15018,
    "h": 278.4
  },
  "luminance": 0.07114
}

Semantic roles & 50–950 ramp

primary

#403F9E

secondary

#B9BA7F

accent

#D355D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403F9E

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

Preview Lab → · Contrast checker → · Palette generator →