#403DB3#403DB3

#403DB3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.1% C 0.181 H 277.1°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#403DB3
RGB	rgb(64, 61, 179)
HSL	hsl(242, 49%, 47%)
HSV	hsv(242, 66%, 70%)
CMYK	cmyk(64.2%, 65.9%, 0%, 29.8%)
CIE-LAB	lab(33.31, 37.71, -62.28)
CIE-LCH	lch(33.31, 72.80, 301.20°)
OKLab	oklab(44.08% 0.0223 -0.1796)
OKLCH	oklch(44.08% 0.181 277.1)
XYZ	xyz(11.9171, 7.6812, 43.4937)
Luminance	0.0768 (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

#403DB3 #B0B33D

analogous

#3D75B3 #403DB3 #7B3DB3

triadic

#403DB3 #B3403D #3DB340

tetradic

#403DB3 #B33D75 #B0B33D #3DB37B

square

#403DB3 #B33D75 #B0B33D #3DB37B

split-complementary

#403DB3 #B37B3D #75B33D

monochromatic

#1F1E58 #302D85 #403DB3 #6663CA #9391D9

Accessibility & contrast

On white

8.28

#403DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#403DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403DB3

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403DB3	#FFFFFF	#000000	##FFFFFF
##403DB3	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0049B1

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #403db3;
/* rgb */ color: rgb(64, 61, 179);
/* oklch */ color: oklch(44.1% 0.181 277.1);

Tailwind

colors: {
  custom: {
    50: '#8273cb',
    500: '#403db3',
    950: '#000000',
  },
}

SCSS

$custom: #403db3;
$custom-light: #8273cb;
$custom-dark: #000000;

JSON

{
  "hex": "#403db3",
  "rgb": {
    "r": 64,
    "g": 61,
    "b": 179
  },
  "hsl": {
    "h": 241.525,
    "s": 49.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44076,
    "c": 0.18095,
    "h": 277.1
  },
  "luminance": 0.07682
}

Semantic roles & 50–950 ramp

primary

#403DB3

secondary

#C3C587

accent

#D94FD5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403DB3

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

Preview Lab → · Contrast checker → · Palette generator →