#40397B#40397B

#40397B is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.8% C 0.108 H 285.0°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#40397B
RGB	rgb(64, 57, 123)
HSL	hsl(246, 37%, 35%)
HSV	hsv(246, 54%, 48%)
CMYK	cmyk(48%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(27.97, 21.56, -36.75)
CIE-LCH	lch(27.97, 42.61, 300.40°)
OKLab	oklab(38.77% 0.028 -0.1046)
OKLCH	oklch(38.77% 0.108 285)
XYZ	xyz(7.1516, 5.4460, 19.4094)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40397B #747B39

analogous

#39537B #40397B #61397B

triadic

#40397B #7B4039 #397B40

tetradic

#40397B #7B3953 #747B39 #397B61

square

#40397B #7B3953 #747B39 #397B61

split-complementary

#40397B #7B6139 #537B39

monochromatic

#141227 #2A2651 #40397B #564CA5 #7971BD

Accessibility & contrast

On white

10.05

#40397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#40397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40397B

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40397B	#FFFFFF	#000000	##FFFFFF
##40397B	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447D

Deuteranopia (green-blind)

#18407A

Tritanopia (blue-blind)

#2D4754

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #40397b;
/* rgb */ color: rgb(64, 57, 123);
/* oklch */ color: oklch(38.8% 0.108 285.0);

Tailwind

colors: {
  custom: {
    50: '#796fa2',
    500: '#40397b',
    950: '#000000',
  },
}

SCSS

$custom: #40397b;
$custom-light: #796fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#40397b",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 246.364,
    "s": 36.667,
    "l": 35.294
  },
  "oklch": {
    "l": 0.38774,
    "c": 0.10825,
    "h": 285
  },
  "luminance": 0.05446
}

Semantic roles & 50–950 ramp

primary

#40397B

secondary

#A0A669

accent

#CD5BC1

background

#F7F6FA

surface

#EEECF3

border

#C9C7CD

text

#09070F

muted

#7B7A7F

Preview Lab

Preview with #40397B

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

Preview Lab → · Contrast checker → · Palette generator →