#40478B#40478B

#40478B is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.8% C 0.111 H 276.2°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#40478B
RGB	rgb(64, 71, 139)
HSL	hsl(234, 37%, 40%)
HSV	hsv(234, 54%, 55%)
CMYK	cmyk(54%, 48.9%, 0%, 45.5%)
CIE-LAB	lab(32.83, 17.64, -38.90)
CIE-LCH	lch(32.83, 42.71, 294.39°)
OKLab	oklab(42.77% 0.012 -0.1108)
OKLCH	oklch(42.77% 0.111 276.2)
XYZ	xyz(9.0263, 7.4600, 25.3854)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40478B #8B8440

analogous

#406D8B #40478B #5F408B

triadic

#40478B #8B4047 #478B40

tetradic

#40478B #8B406D #8B8440 #408B5F

square

#40478B #8B406D #8B8440 #408B5F

split-complementary

#40478B #8B5F40 #6D8B40

monochromatic

#191C37 #2D3261 #40478B #575FB2 #8187C5

Accessibility & contrast

On white

8.43

#40478B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#40478B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40478B

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40478B	#FFFFFF	#000000	##FFFFFF
##40478B	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28508D

Deuteranopia (green-blind)

#204A8A

Tritanopia (blue-blind)

#1F5662

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #40478b;
/* rgb */ color: rgb(64, 71, 139);
/* oklch */ color: oklch(42.8% 0.111 276.2);

Tailwind

colors: {
  custom: {
    50: '#7b7aad',
    500: '#40478b',
    950: '#000000',
  },
}

SCSS

$custom: #40478b;
$custom-light: #7b7aad;
$custom-dark: #000000;

JSON

{
  "hex": "#40478b",
  "rgb": {
    "r": 64,
    "g": 71,
    "b": 139
  },
  "hsl": {
    "h": 234.4,
    "s": 36.946,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42773,
    "c": 0.11143,
    "h": 276.2
  },
  "luminance": 0.07461
}

Semantic roles & 50–950 ramp

primary

#40478B

secondary

#AFAA78

accent

#C25BCD

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #40478B

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

Preview Lab → · Contrast checker → · Palette generator →