#403F9C#403F9C

#403F9C is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.147 H 278.6°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#403F9C
RGB	rgb(64, 63, 156)
HSL	hsl(241, 42%, 43%)
HSV	hsv(241, 60%, 61%)
CMYK	cmyk(59%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(31.91, 28.68, -50.76)
CIE-LCH	lch(31.91, 58.31, 299.46°)
OKLab	oklab(42.46% 0.0219 -0.1457)
OKLCH	oklch(42.46% 0.147 278.6)
XYZ	xyz(9.8907, 7.0446, 32.2846)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.99

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F9C #9B9C3F

analogous

#3F6C9C #403F9C #6E3F9C

triadic

#403F9C #9C403F #3F9C40

tetradic

#403F9C #9C3F6C #9B9C3F #3F9C6E

square

#403F9C #9C3F6C #9B9C3F #3F9C6E

split-complementary

#403F9C #9C6E3F #6C9C3F

monochromatic

#1C1C45 #2E2D70 #403F9C #5C5BBD #8887CE

Accessibility & contrast

On white

8.72

#403F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#403F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F9C

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F9C	#FFFFFF	#000000	##FFFFFF
##403F9C	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9F

Deuteranopia (green-blind)

#00479A

Tritanopia (blue-blind)

#045567

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #403f9c;
/* rgb */ color: rgb(64, 63, 156);
/* oklch */ color: oklch(42.5% 0.147 278.6);

Tailwind

colors: {
  custom: {
    50: '#7e74ba',
    500: '#403f9c',
    950: '#000000',
  },
}

SCSS

$custom: #403f9c;
$custom-light: #7e74ba;
$custom-dark: #000000;

JSON

{
  "hex": "#403f9c",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 240.645,
    "s": 42.466,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42462,
    "c": 0.14738,
    "h": 278.6
  },
  "luminance": 0.07045
}

Semantic roles & 50–950 ramp

primary

#403F9C

secondary

#B8B97E

accent

#D256D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403F9C

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

Preview Lab → · Contrast checker → · Palette generator →