#403FA3#403FA3

#403FA3 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.0% C 0.157 H 278.0°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#403FA3
RGB	rgb(64, 63, 163)
HSL	hsl(241, 44%, 44%)
HSV	hsv(241, 61%, 64%)
CMYK	cmyk(60.7%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(32.46, 31.06, -54.11)
CIE-LCH	lch(32.46, 62.39, 299.86°)
OKLab	oklab(43.04% 0.0217 -0.1556)
OKLCH	oklch(43.04% 0.157 278)
XYZ	xyz(10.5006, 7.2886, 35.4967)
Luminance	0.0729 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.01

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA3 #A2A33F

analogous

#3F70A3 #403FA3 #723FA3

triadic

#403FA3 #A3403F #3FA340

tetradic

#403FA3 #A33F70 #A2A33F #3FA372

square

#403FA3 #A33F70 #A2A33F #3FA372

split-complementary

#403FA3 #A3723F #70A33F

monochromatic

#1D1D4B #2F2E77 #403FA3 #5F5EC1 #8B8AD2

Accessibility & contrast

On white

8.54

#403FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#403FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA3

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA3	#FFFFFF	#000000	##FFFFFF
##403FA3	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A6

Deuteranopia (green-blind)

#0048A1

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #403fa3;
/* rgb */ color: rgb(64, 63, 163);
/* oklch */ color: oklch(43.0% 0.157 278.0);

Tailwind

colors: {
  custom: {
    50: '#7f74bf',
    500: '#403fa3',
    950: '#000000',
  },
}

SCSS

$custom: #403fa3;
$custom-light: #7f74bf;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa3",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 240.6,
    "s": 44.248,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43037,
    "c": 0.15708,
    "h": 278
  },
  "luminance": 0.07289
}

Semantic roles & 50–950 ramp

primary

#403FA3

secondary

#BCBD81

accent

#D454D3

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403FA3

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

Preview Lab → · Contrast checker → · Palette generator →