#403FB1#403FB1

#403FB1 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.176 H 276.8°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#403FB1
RGB	rgb(64, 63, 177)
HSL	hsl(241, 48%, 47%)
HSV	hsv(241, 64%, 69%)
CMYK	cmyk(63.8%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(33.60, 35.81, -60.61)
CIE-LCH	lch(33.60, 70.40, 300.57°)
OKLab	oklab(44.24% 0.0209 -0.1747)
OKLCH	oklch(44.24% 0.176 276.8)
XYZ	xyz(11.8251, 7.8184, 42.4724)
Luminance	0.0782 (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

#403FB1 #B0B13F

analogous

#3F77B1 #403FB1 #793FB1

triadic

#403FB1 #B1403F #3FB140

tetradic

#403FB1 #B13F77 #B0B13F #3FB179

square

#403FB1 #B13F77 #B0B13F #3FB179

split-complementary

#403FB1 #B1793F #77B13F

monochromatic

#1F1F57 #302F84 #403FB1 #6665C8 #9392D8

Accessibility & contrast

On white

8.19

#403FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#403FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FB1

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FB1	#FFFFFF	#000000	##FFFFFF
##403FB1	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#004AAF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #403fb1;
/* rgb */ color: rgb(64, 63, 177);
/* oklch */ color: oklch(44.2% 0.176 276.8);

Tailwind

colors: {
  custom: {
    50: '#8274c9',
    500: '#403fb1',
    950: '#000000',
  },
}

SCSS

$custom: #403fb1;
$custom-light: #8274c9;
$custom-dark: #000000;

JSON

{
  "hex": "#403fb1",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 240.526,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44235,
    "c": 0.17592,
    "h": 276.8
  },
  "luminance": 0.07819
}

Semantic roles & 50–950 ramp

primary

#403FB1

secondary

#C3C488

accent

#D751D6

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403FB1

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

Preview Lab → · Contrast checker → · Palette generator →