#40579E#40579E

#40579E is a mid, moderate blue. Relative luminance 0.104; OKLCH L 47.5% C 0.118 H 268.2°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#40579E
RGB	rgb(64, 87, 158)
HSL	hsl(225, 42%, 44%)
HSV	hsv(225, 59%, 62%)
CMYK	cmyk(59.5%, 44.9%, 0%, 38%)
CIE-LAB	lab(38.51, 13.73, -41.35)
CIE-LCH	lch(38.51, 43.57, 288.37°)
OKLab	oklab(47.48% -0.0037 -0.1178)
OKLCH	oklch(47.48% 0.118 268.2)
XYZ	xyz(11.6920, 10.3741, 33.7274)
Luminance	0.1037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40579E #9E8740

analogous

#40869E #40579E #58409E

triadic

#40579E #9E4057 #579E40

tetradic

#40579E #9E4086 #9E8740 #409E58

square

#40579E #9E4086 #9E8740 #409E58

split-complementary

#40579E #9E5840 #869E40

monochromatic

#1D2747 #2E3F72 #40579E #5E75BE #899ACF

Accessibility & contrast

On white

6.83

#40579E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#40579E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #40579E

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40579E	#FFFFFF	#000000	##FFFFFF
##40579E	1.00	6.83	3.08	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375FA1

Deuteranopia (green-blind)

#2A579C

Tritanopia (blue-blind)

#006773

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #40579e;
/* rgb */ color: rgb(64, 87, 158);
/* oklch */ color: oklch(47.5% 0.118 268.2);

Tailwind

colors: {
  custom: {
    50: '#7d86bb',
    500: '#40579e',
    950: '#000000',
  },
}

SCSS

$custom: #40579e;
$custom-light: #7d86bb;
$custom-dark: #000000;

JSON

{
  "hex": "#40579e",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 158
  },
  "hsl": {
    "h": 225.319,
    "s": 42.342,
    "l": 43.529
  },
  "oklch": {
    "l": 0.47477,
    "c": 0.11786,
    "h": 268.2
  },
  "luminance": 0.10375
}

Semantic roles & 50–950 ramp

primary

#40579E

secondary

#BAAC80

accent

#B456D2

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #40579E

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

Preview Lab → · Contrast checker → · Palette generator →