#40579C#40579C

#40579C is a mid, moderate blue. Relative luminance 0.103; OKLCH L 47.3% C 0.115 H 268.0°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#40579C
RGB	rgb(64, 87, 156)
HSL	hsl(225, 42%, 43%)
HSV	hsv(225, 59%, 61%)
CMYK	cmyk(59%, 44.2%, 0%, 38.8%)
CIE-LAB	lab(38.39, 13.03, -40.34)
CIE-LCH	lch(38.39, 42.39, 287.90°)
OKLab	oklab(47.35% -0.0041 -0.1148)
OKLCH	oklch(47.35% 0.115 268)
XYZ	xyz(11.5213, 10.3058, 32.8281)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40579C #9C8540

analogous

#40859C #40579C #57409C

triadic

#40579C #9C4057 #579C40

tetradic

#40579C #9C4085 #9C8540 #409C57

square

#40579C #9C4085 #9C8540 #409C57

split-complementary

#40579C #9C5740 #859C40

monochromatic

#1C2745 #2E3F71 #40579C #5D75BC #889ACE

Accessibility & contrast

On white

6.86

#40579C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#40579C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #40579C

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40579C	#FFFFFF	#000000	##FFFFFF
##40579C	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#385F9F

Deuteranopia (green-blind)

#2C579B

Tritanopia (blue-blind)

#006672

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #40579c;
/* rgb */ color: rgb(64, 87, 156);
/* oklch */ color: oklch(47.3% 0.115 268.0);

Tailwind

colors: {
  custom: {
    50: '#7d86b9',
    500: '#40579c',
    950: '#000000',
  },
}

SCSS

$custom: #40579c;
$custom-light: #7d86b9;
$custom-dark: #000000;

JSON

{
  "hex": "#40579c",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 156
  },
  "hsl": {
    "h": 225,
    "s": 41.818,
    "l": 43.137
  },
  "oklch": {
    "l": 0.47347,
    "c": 0.11491,
    "h": 268
  },
  "luminance": 0.10307
}

Semantic roles & 50–950 ramp

primary

#40579C

secondary

#B9AA7F

accent

#B356D2

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #40579C

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

Preview Lab → · Contrast checker → · Palette generator →