#403FBC#403FBC

#403FBC is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.2% C 0.190 H 276.0°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#403FBC
RGB	rgb(64, 63, 188)
HSL	hsl(240, 50%, 49%)
HSV	hsv(240, 66%, 74%)
CMYK	cmyk(66%, 66.5%, 0%, 26.3%)
CIE-LAB	lab(34.55, 39.51, -65.57)
CIE-LCH	lch(34.55, 76.55, 301.07°)
OKLab	oklab(45.22% 0.0199 -0.1892)
OKLCH	oklch(45.22% 0.19 276)
XYZ	xyz(12.9660, 8.2747, 48.4811)
Luminance	0.0828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FBC #BBBC3F

analogous

#3F7DBC #403FBC #7F3FBC

triadic

#403FBC #BC403F #3FBC40

tetradic

#403FBC #BC3F7D #BBBC3F #3FBC7F

square

#403FBC #BC3F7D #BBBC3F #3FBC7F

split-complementary

#403FBC #BC7F3F #7DBC3F

monochromatic

#212060 #30308E #403FBC #6C6BCD #9999DD

Accessibility & contrast

On white

7.91

#403FBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#403FBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FBC

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FBC	#FFFFFF	#000000	##FFFFFF
##403FBC	1.00	7.91	2.66	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C0

Deuteranopia (green-blind)

#004CBA

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #403fbc;
/* rgb */ color: rgb(64, 63, 188);
/* oklch */ color: oklch(45.2% 0.190 276.0);

Tailwind

colors: {
  custom: {
    50: '#8475d1',
    500: '#403fbc',
    950: '#000000',
  },
}

SCSS

$custom: #403fbc;
$custom-light: #8475d1;
$custom-dark: #000000;

JSON

{
  "hex": "#403fbc",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 188
  },
  "hsl": {
    "h": 240.48,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.45216,
    "c": 0.19025,
    "h": 276
  },
  "luminance": 0.08276
}

Semantic roles & 50–950 ramp

primary

#403FBC

secondary

#C8C98E

accent

#D94ED8

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #403FBC

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

Preview Lab → · Contrast checker → · Palette generator →