#403FA5#403FA5

#403FA5 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.2% C 0.160 H 277.8°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#403FA5
RGB	rgb(64, 63, 165)
HSL	hsl(241, 45%, 45%)
HSV	hsv(241, 62%, 65%)
CMYK	cmyk(61.2%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(32.61, 31.74, -55.05)
CIE-LCH	lch(32.61, 63.54, 299.97°)
OKLab	oklab(43.21% 0.0217 -0.1583)
OKLCH	oklch(43.21% 0.16 277.8)
XYZ	xyz(10.6812, 7.3608, 36.4479)
Luminance	0.0736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.74

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA5 #A4A53F

analogous

#3F71A5 #403FA5 #733FA5

triadic

#403FA5 #A5403F #3FA540

tetradic

#403FA5 #A53F71 #A4A53F #3FA573

square

#403FA5 #A53F71 #A4A53F #3FA573

split-complementary

#403FA5 #A5733F #71A53F

monochromatic

#1E1D4C #2F2E79 #403FA5 #605FC2 #8C8CD3

Accessibility & contrast

On white

8.49

#403FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#403FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA5

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA5	#FFFFFF	#000000	##FFFFFF
##403FA5	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A8

Deuteranopia (green-blind)

#0048A3

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403fa5;
/* rgb */ color: rgb(64, 63, 165);
/* oklch */ color: oklch(43.2% 0.160 277.8);

Tailwind

colors: {
  custom: {
    50: '#8074c0',
    500: '#403fa5',
    950: '#000000',
  },
}

SCSS

$custom: #403fa5;
$custom-light: #8074c0;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa5",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 240.588,
    "s": 44.737,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43205,
    "c": 0.15981,
    "h": 277.8
  },
  "luminance": 0.07362
}

Semantic roles & 50–950 ramp

primary

#403FA5

secondary

#BDBE82

accent

#D453D3

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403FA5

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

Preview Lab → · Contrast checker → · Palette generator →