#40539E#40539E

#40539E is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.6% C 0.123 H 270.3°. Best body text is #FFFFFF at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#40539E
RGB	rgb(64, 83, 158)
HSL	hsl(228, 42%, 44%)
HSV	hsv(228, 59%, 62%)
CMYK	cmyk(59.5%, 47.5%, 0%, 38%)
CIE-LAB	lab(37.38, 16.33, -43.15)
CIE-LCH	lch(37.38, 46.14, 290.73°)
OKLab	oklab(46.62% 0.0007 -0.1231)
OKLCH	oklch(46.62% 0.123 270.3)
XYZ	xyz(11.3771, 9.7442, 33.6224)
Luminance	0.0974 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40539E #9E8B40

analogous

#40829E #40539E #5C409E

triadic

#40539E #9E4053 #539E40

tetradic

#40539E #9E4082 #9E8B40 #409E5C

square

#40539E #9E4082 #9E8B40 #409E5C

split-complementary

#40539E #9E5C40 #829E40

monochromatic

#1D2547 #2E3C72 #40539E #5E71BE #8997CF

Accessibility & contrast

On white

7.12

#40539E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#40539E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40539E

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40539E	#FFFFFF	#000000	##FFFFFF
##40539E	1.00	7.12	2.95	7.12
#FFFFFF	7.12	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F5CA1

Deuteranopia (green-blind)

#21549C

Tritanopia (blue-blind)

#006471

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #40539e;
/* rgb */ color: rgb(64, 83, 158);
/* oklch */ color: oklch(46.6% 0.123 270.3);

Tailwind

colors: {
  custom: {
    50: '#7d83bb',
    500: '#40539e',
    950: '#000000',
  },
}

SCSS

$custom: #40539e;
$custom-light: #7d83bb;
$custom-dark: #000000;

JSON

{
  "hex": "#40539e",
  "rgb": {
    "r": 64,
    "g": 83,
    "b": 158
  },
  "hsl": {
    "h": 227.872,
    "s": 42.342,
    "l": 43.529
  },
  "oklch": {
    "l": 0.46617,
    "c": 0.12314,
    "h": 270.3
  },
  "luminance": 0.09745
}

Semantic roles & 50–950 ramp

primary

#40539E

secondary

#BAAE80

accent

#B956D2

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #40539E

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

Preview Lab → · Contrast checker → · Palette generator →