#40378E#40378E

#40378E is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.139 H 282.8°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#40378E
RGB	rgb(64, 55, 142)
HSL	hsl(246, 44%, 39%)
HSV	hsv(246, 61%, 56%)
CMYK	cmyk(54.9%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(28.84, 29.11, -47.19)
CIE-LCH	lch(28.84, 55.44, 301.67°)
OKLab	oklab(39.86% 0.0307 -0.1353)
OKLCH	oklch(39.86% 0.139 282.8)
XYZ	xyz(8.3615, 5.7749, 26.2600)
Luminance	0.0578 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40378E #858E37

analogous

#37598E #40378E #6B378E

triadic

#40378E #8E4037 #378E40

tetradic

#40378E #8E3759 #858E37 #378E6B

square

#40378E #8E3759 #858E37 #378E6B

split-complementary

#40378E #8E6B37 #598E37

monochromatic

#181536 #2C2662 #40378E #5549B9 #7E76CA

Accessibility & contrast

On white

9.74

#40378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#40378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40378E

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40378E	#FFFFFF	#000000	##FFFFFF
##40378E	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#00418C

Tritanopia (blue-blind)

#1E4C5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #40378e;
/* rgb */ color: rgb(64, 55, 142);
/* oklch */ color: oklch(39.9% 0.139 282.8);

Tailwind

colors: {
  custom: {
    50: '#7c6eb0',
    500: '#40378e',
    950: '#000000',
  },
}

SCSS

$custom: #40378e;
$custom-light: #7c6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#40378e",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 246.207,
    "s": 44.162,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39856,
    "c": 0.13871,
    "h": 282.8
  },
  "luminance": 0.05775
}

Semantic roles & 50–950 ramp

primary

#40378E

secondary

#ACB36E

accent

#D454C7

background

#F7F6FA

surface

#EEECF5

border

#C9C7CF

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #40378E

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

Preview Lab → · Contrast checker → · Palette generator →