#40439B#40439B

#40439B is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.1% C 0.141 H 277.3°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#40439B
RGB	rgb(64, 67, 155)
HSL	hsl(238, 42%, 43%)
HSV	hsv(238, 59%, 61%)
CMYK	cmyk(58.7%, 56.8%, 0%, 39.2%)
CIE-LAB	lab(32.85, 25.75, -48.63)
CIE-LCH	lch(32.85, 55.02, 297.90°)
OKLab	oklab(43.14% 0.0178 -0.1394)
OKLCH	oklch(43.14% 0.141 277.3)
XYZ	xyz(10.0360, 7.4701, 31.9170)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40439B #9B9840

analogous

#40709B #40439B #6A409B

triadic

#40439B #9B4043 #439B40

tetradic

#40439B #9B4070 #9B9840 #409B6A

square

#40439B #9B4070 #9B9840 #409B6A

split-complementary

#40439B #9B6A40 #709B40

monochromatic

#1C1E44 #2E3070 #40439B #5C60BC #888ACE

Accessibility & contrast

On white

8.42

#40439B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#40439B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40439B

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40439B	#FFFFFF	#000000	##FFFFFF
##40439B	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00519E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#055868

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #40439b;
/* rgb */ color: rgb(64, 67, 155);
/* oklch */ color: oklch(43.1% 0.141 277.3);

Tailwind

colors: {
  custom: {
    50: '#7d77b9',
    500: '#40439b',
    950: '#000000',
  },
}

SCSS

$custom: #40439b;
$custom-light: #7d77b9;
$custom-dark: #000000;

JSON

{
  "hex": "#40439b",
  "rgb": {
    "r": 64,
    "g": 67,
    "b": 155
  },
  "hsl": {
    "h": 238.022,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4314,
    "c": 0.14055,
    "h": 277.3
  },
  "luminance": 0.07471
}

Semantic roles & 50–950 ramp

primary

#40439B

secondary

#B8B67E

accent

#CD56D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #40439B

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

Preview Lab → · Contrast checker → · Palette generator →