#40539B#40539B

#40539B is a mid, moderate blue. Relative luminance 0.096; OKLCH L 46.4% C 0.119 H 270.1°. Best body text is #FFFFFF at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#40539B
RGB	rgb(64, 83, 155)
HSL	hsl(227, 42%, 43%)
HSV	hsv(227, 59%, 61%)
CMYK	cmyk(58.7%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(37.19, 15.28, -41.65)
CIE-LCH	lch(37.19, 44.36, 290.15°)
OKLab	oklab(46.41% 0.0003 -0.1187)
OKLCH	oklch(46.41% 0.119 270.1)
XYZ	xyz(11.1220, 9.6422, 32.2790)
Luminance	0.0964 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40539B #9B8840

analogous

#40809B #40539B #5B409B

triadic

#40539B #9B4053 #539B40

tetradic

#40539B #9B4080 #9B8840 #409B5B

square

#40539B #9B4080 #9B8840 #409B5B

split-complementary

#40539B #9B5B40 #809B40

monochromatic

#1C2544 #2E3C70 #40539B #5C70BC #8896CE

Accessibility & contrast

On white

7.17

#40539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#40539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40539B

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40539B	#FFFFFF	#000000	##FFFFFF
##40539B	1.00	7.17	2.93	7.17
#FFFFFF	7.17	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#325C9E

Deuteranopia (green-blind)

#255499

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #40539b;
/* rgb */ color: rgb(64, 83, 155);
/* oklch */ color: oklch(46.4% 0.119 270.1);

Tailwind

colors: {
  custom: {
    50: '#7d83b9',
    500: '#40539b',
    950: '#000000',
  },
}

SCSS

$custom: #40539b;
$custom-light: #7d83b9;
$custom-dark: #000000;

JSON

{
  "hex": "#40539b",
  "rgb": {
    "r": 64,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 227.473,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.46414,
    "c": 0.11872,
    "h": 270.1
  },
  "luminance": 0.09643
}

Semantic roles & 50–950 ramp

primary

#40539B

secondary

#B8AC7E

accent

#B856D1

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #40539B

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

Preview Lab → · Contrast checker → · Palette generator →