#403BB9#403BB9

#403BB9 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.191 H 277.0°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#403BB9
RGB	rgb(64, 59, 185)
HSL	hsl(242, 52%, 48%)
HSV	hsv(242, 68%, 73%)
CMYK	cmyk(65.4%, 68.1%, 0%, 27.5%)
CIE-LAB	lab(33.39, 40.91, -65.70)
CIE-LCH	lch(33.39, 77.39, 301.91°)
OKLab	oklab(44.3% 0.0232 -0.1896)
OKLCH	oklch(44.3% 0.191 277)
XYZ	xyz(12.4324, 7.7197, 46.7244)
Luminance	0.0772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.67

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403BB9 #B4B93B

analogous

#3B75B9 #403BB9 #7F3BB9

triadic

#403BB9 #B9403B #3BB940

tetradic

#403BB9 #B93B75 #B4B93B #3BB97F

square

#403BB9 #B93B75 #B4B93B #3BB97F

split-complementary

#403BB9 #B97F3B #75B93B

monochromatic

#201D5C #302C8B #403BB9 #6864CD #9592DC

Accessibility & contrast

On white

8.25

#403BB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#403BB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403BB9

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403BB9	#FFFFFF	#000000	##FFFFFF
##403BB9	1.00	8.25	2.54	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #403bb9;
/* rgb */ color: rgb(64, 59, 185);
/* oklch */ color: oklch(44.3% 0.191 277.0);

Tailwind

colors: {
  custom: {
    50: '#8472cf',
    500: '#403bb9',
    950: '#000000',
  },
}

SCSS

$custom: #403bb9;
$custom-light: #8472cf;
$custom-dark: #000000;

JSON

{
  "hex": "#403bb9",
  "rgb": {
    "r": 64,
    "g": 59,
    "b": 185
  },
  "hsl": {
    "h": 242.381,
    "s": 51.639,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44298,
    "c": 0.191,
    "h": 277
  },
  "luminance": 0.07721
}

Semantic roles & 50–950 ramp

primary

#403BB9

secondary

#C5C788

accent

#DB4DD5

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #403BB9

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

Preview Lab → · Contrast checker → · Palette generator →