#403A66#403A66

#403A66 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.074 H 288.6°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#403A66
RGB	rgb(64, 58, 102)
HSL	hsl(248, 28%, 31%)
HSV	hsv(248, 43%, 40%)
CMYK	cmyk(37.3%, 43.1%, 0%, 60%)
CIE-LAB	lab(26.95, 14.24, -25.01)
CIE-LCH	lch(26.95, 28.78, 299.66°)
OKLab	oklab(37.58% 0.0236 -0.0702)
OKLCH	oklch(37.58% 0.074 288.6)
XYZ	xyz(6.0250, 5.0752, 13.2300)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403A66 #60663A

analogous

#3A4A66 #403A66 #563A66

triadic

#403A66 #66403A #3A6640

tetradic

#403A66 #663A4A #60663A #3A6656

square

#403A66 #663A4A #60663A #3A6656

split-complementary

#403A66 #66563A #4A663A

monochromatic

#0F0E18 #28243F #403A66 #58508D #766EAC

Accessibility & contrast

On white

10.42

#403A66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#403A66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403A66

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403A66	#FFFFFF	#000000	##FFFFFF
##403A66	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4168

Deuteranopia (green-blind)

#2C3F65

Tritanopia (blue-blind)

#36424B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #403a66;
/* rgb */ color: rgb(64, 58, 102);
/* oklch */ color: oklch(37.6% 0.074 288.6);

Tailwind

colors: {
  custom: {
    50: '#767092',
    500: '#403a66',
    950: '#000000',
  },
}

SCSS

$custom: #403a66;
$custom-light: #767092;
$custom-dark: #000000;

JSON

{
  "hex": "#403a66",
  "rgb": {
    "r": 64,
    "g": 58,
    "b": 102
  },
  "hsl": {
    "h": 248.182,
    "s": 27.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.37583,
    "c": 0.07406,
    "h": 288.6
  },
  "luminance": 0.05075
}

Semantic roles & 50–950 ramp

primary

#403A66

secondary

#909666

accent

#C464B7

background

#F7F6F8

surface

#EDECF0

border

#C8C7CB

text

#09070D

muted

#7B7A7D

Preview Lab

Preview with #403A66

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

Preview Lab → · Contrast checker → · Palette generator →