#40539F#40539F

#40539F is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.7% C 0.125 H 270.4°. Best body text is #FFFFFF at 7.10:1 contrast (WCAG AA passes).

Color values

HEX	#40539F
RGB	rgb(64, 83, 159)
HSL	hsl(228, 43%, 44%)
HSV	hsv(228, 60%, 62%)
CMYK	cmyk(59.7%, 47.8%, 0%, 37.6%)
CIE-LAB	lab(37.44, 16.68, -43.65)
CIE-LCH	lch(37.44, 46.73, 290.92°)
OKLab	oklab(46.69% 0.0009 -0.1246)
OKLCH	oklch(46.69% 0.125 270.4)
XYZ	xyz(11.4635, 9.7788, 34.0776)
Luminance	0.0978 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40539F #9F8C40

analogous

#40829F #40539F #5C409F

triadic

#40539F #9F4053 #539F40

tetradic

#40539F #9F4082 #9F8C40 #409F5C

square

#40539F #9F4082 #9F8C40 #409F5C

split-complementary

#40539F #9F5C40 #829F40

monochromatic

#1D2548 #2E3C73 #40539F #5E71BE #8A98D0

Accessibility & contrast

On white

7.10

#40539F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#40539F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40539F

7.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40539F	#FFFFFF	#000000	##FFFFFF
##40539F	1.00	7.10	2.96	7.10
#FFFFFF	7.10	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5DA2

Deuteranopia (green-blind)

#20549D

Tritanopia (blue-blind)

#006471

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #40539f;
/* rgb */ color: rgb(64, 83, 159);
/* oklch */ color: oklch(46.7% 0.125 270.4);

Tailwind

colors: {
  custom: {
    50: '#7d83bc',
    500: '#40539f',
    950: '#000000',
  },
}

SCSS

$custom: #40539f;
$custom-light: #7d83bc;
$custom-dark: #000000;

JSON

{
  "hex": "#40539f",
  "rgb": {
    "r": 64,
    "g": 83,
    "b": 159
  },
  "hsl": {
    "h": 228,
    "s": 42.601,
    "l": 43.725
  },
  "oklch": {
    "l": 0.46685,
    "c": 0.1246,
    "h": 270.4
  },
  "luminance": 0.0978
}

Semantic roles & 50–950 ramp

primary

#40539F

secondary

#BBAF80

accent

#B955D2

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #40539F

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

Preview Lab → · Contrast checker → · Palette generator →