#40409B#40409B

#40409B is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.145 H 278.3°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#40409B
RGB	rgb(64, 64, 155)
HSL	hsl(240, 42%, 43%)
HSV	hsv(240, 59%, 61%)
CMYK	cmyk(58.7%, 58.7%, 0%, 39.2%)
CIE-LAB	lab(32.08, 27.69, -49.87)
CIE-LCH	lch(32.08, 57.05, 299.04°)
OKLab	oklab(42.57% 0.0209 -0.1431)
OKLCH	oklch(42.57% 0.145 278.3)
XYZ	xyz(9.8623, 7.1226, 31.8591)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40409B #9B9B40

analogous

#406D9B #40409B #6D409B

triadic

#40409B #9B4040 #409B40

tetradic

#40409B #9B406D #9B9B40 #409B6D

square

#40409B #9B406D #9B9B40 #409B6D

split-complementary

#40409B #9B6D40 #6D9B40

monochromatic

#1C1C44 #2E2E70 #40409B #5C5CBC #8888CE

Accessibility & contrast

On white

8.66

#40409B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#40409B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40409B

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40409B	#FFFFFF	#000000	##FFFFFF
##40409B	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9E

Deuteranopia (green-blind)

#004899

Tritanopia (blue-blind)

#065667

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #40409b;
/* rgb */ color: rgb(64, 64, 155);
/* oklch */ color: oklch(42.6% 0.145 278.3);

Tailwind

colors: {
  custom: {
    50: '#7e75b9',
    500: '#40409b',
    950: '#000000',
  },
}

SCSS

$custom: #40409b;
$custom-light: #7e75b9;
$custom-dark: #000000;

JSON

{
  "hex": "#40409b",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 155
  },
  "hsl": {
    "h": 240,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42568,
    "c": 0.14463,
    "h": 278.3
  },
  "luminance": 0.07123
}

Semantic roles & 50–950 ramp

primary

#40409B

secondary

#B8B87E

accent

#D156D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0811

muted

#7C7B80

Preview Lab

Preview with #40409B

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

Preview Lab → · Contrast checker → · Palette generator →