#403FA8#403FA8

#403FA8 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.164 H 277.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#403FA8
RGB	rgb(64, 63, 168)
HSL	hsl(241, 45%, 45%)
HSV	hsv(241, 63%, 66%)
CMYK	cmyk(61.9%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(32.86, 32.76, -56.46)
CIE-LCH	lch(32.86, 65.27, 300.12°)
OKLab	oklab(43.46% 0.0215 -0.1625)
OKLCH	oklch(43.46% 0.164 277.5)
XYZ	xyz(10.9575, 7.4713, 37.9029)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.35

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA8 #A7A83F

analogous

#3F73A8 #403FA8 #743FA8

triadic

#403FA8 #A8403F #3FA840

tetradic

#403FA8 #A83F73 #A7A83F #3FA874

square

#403FA8 #A83F73 #A7A83F #3FA874

split-complementary

#403FA8 #A8743F #73A83F

monochromatic

#1E1E4F #2F2E7B #403FA8 #6261C4 #8E8DD4

Accessibility & contrast

On white

8.42

#403FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#403FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA8

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA8	#FFFFFF	#000000	##FFFFFF
##403FA8	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AB

Deuteranopia (green-blind)

#0049A6

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403fa8;
/* rgb */ color: rgb(64, 63, 168);
/* oklch */ color: oklch(43.5% 0.164 277.5);

Tailwind

colors: {
  custom: {
    50: '#8074c3',
    500: '#403fa8',
    950: '#000000',
  },
}

SCSS

$custom: #403fa8;
$custom-light: #8074c3;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa8",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 240.571,
    "s": 45.455,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43458,
    "c": 0.16389,
    "h": 277.5
  },
  "luminance": 0.07472
}

Semantic roles & 50–950 ramp

primary

#403FA8

secondary

#BFBF84

accent

#D553D4

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #403FA8

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

Preview Lab → · Contrast checker → · Palette generator →