#403EB3#403EB3

#403EB3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.180 H 276.9°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#403EB3
RGB	rgb(64, 62, 179)
HSL	hsl(241, 49%, 47%)
HSV	hsv(241, 65%, 70%)
CMYK	cmyk(64.2%, 65.4%, 0%, 29.8%)
CIE-LAB	lab(33.54, 37.10, -61.90)
CIE-LCH	lch(33.54, 72.17, 300.94°)
OKLab	oklab(44.24% 0.0215 -0.1785)
OKLCH	oklch(44.24% 0.18 276.9)
XYZ	xyz(11.9710, 7.7889, 43.5117)
Luminance	0.0779 (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

#403EB3 #B1B33E

analogous

#3E76B3 #403EB3 #7B3EB3

triadic

#403EB3 #B3403E #3EB340

tetradic

#403EB3 #B33E76 #B1B33E #3EB37B

square

#403EB3 #B33E76 #B1B33E #3EB37B

split-complementary

#403EB3 #B37B3E #76B33E

monochromatic

#1F1F58 #302E86 #403EB3 #6665CA #9392D9

Accessibility & contrast

On white

8.21

#403EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#403EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403EB3

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403EB3	#FFFFFF	#000000	##FFFFFF
##403EB3	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #403eb3;
/* rgb */ color: rgb(64, 62, 179);
/* oklch */ color: oklch(44.2% 0.180 276.9);

Tailwind

colors: {
  custom: {
    50: '#8274cb',
    500: '#403eb3',
    950: '#000000',
  },
}

SCSS

$custom: #403eb3;
$custom-light: #8274cb;
$custom-dark: #000000;

JSON

{
  "hex": "#403eb3",
  "rgb": {
    "r": 64,
    "g": 62,
    "b": 179
  },
  "hsl": {
    "h": 241.026,
    "s": 48.548,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44242,
    "c": 0.17975,
    "h": 276.9
  },
  "luminance": 0.0779
}

Semantic roles & 50–950 ramp

primary

#403EB3

secondary

#C3C588

accent

#D850D6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403EB3

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

Preview Lab → · Contrast checker → · Palette generator →