#40378D#40378D

#40378D is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.8% C 0.137 H 282.9°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#40378D
RGB	rgb(64, 55, 141)
HSL	hsl(246, 44%, 38%)
HSV	hsv(246, 61%, 55%)
CMYK	cmyk(54.6%, 61%, 0%, 44.7%)
CIE-LAB	lab(28.76, 28.78, -46.69)
CIE-LCH	lch(28.76, 54.85, 301.65°)
OKLab	oklab(39.78% 0.0307 -0.1338)
OKLCH	oklch(39.78% 0.137 282.9)
XYZ	xyz(8.2868, 5.7450, 25.8664)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40378D #848D37

analogous

#37598D #40378D #6B378D

triadic

#40378D #8D4037 #378D40

tetradic

#40378D #8D3759 #848D37 #378D6B

square

#40378D #8D3759 #848D37 #378D6B

split-complementary

#40378D #8D6B37 #598D37

monochromatic

#181535 #2C2661 #40378D #5549B8 #7E75C9

Accessibility & contrast

On white

9.77

#40378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#40378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40378D

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40378D	#FFFFFF	#000000	##FFFFFF
##40378D	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#00418B

Tritanopia (blue-blind)

#1F4B5C

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #40378d;
/* rgb */ color: rgb(64, 55, 141);
/* oklch */ color: oklch(39.8% 0.137 282.9);

Tailwind

colors: {
  custom: {
    50: '#7c6eaf',
    500: '#40378d',
    950: '#000000',
  },
}

SCSS

$custom: #40378d;
$custom-light: #7c6eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#40378d",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 246.279,
    "s": 43.878,
    "l": 38.431
  },
  "oklch": {
    "l": 0.39775,
    "c": 0.1373,
    "h": 282.9
  },
  "luminance": 0.05745
}

Semantic roles & 50–950 ramp

primary

#40378D

secondary

#ABB26E

accent

#D454C6

background

#F7F6FA

surface

#EEECF5

border

#C9C7CF

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #40378D

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

Preview Lab → · Contrast checker → · Palette generator →