#40558B#40558B

#40558B is a mid, moderate blue. Relative luminance 0.095; OKLCH L 45.8% C 0.092 H 266.7°. Best body text is #FFFFFF at 7.27:1 contrast (WCAG AA passes).

Color values

HEX	#40558B
RGB	rgb(64, 85, 139)
HSL	hsl(223, 37%, 40%)
HSV	hsv(223, 54%, 55%)
CMYK	cmyk(54%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(36.84, 8.46, -32.53)
CIE-LCH	lch(36.84, 33.61, 284.59°)
OKLab	oklab(45.84% -0.0053 -0.092)
OKLCH	oklch(45.84% 0.092 266.7)
XYZ	xyz(10.0215, 9.4504, 25.7171)
Luminance	0.0945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40558B #8B7640

analogous

#407B8B #40558B #51408B

triadic

#40558B #8B4055 #558B40

tetradic

#40558B #8B407B #8B7640 #408B51

square

#40558B #8B407B #8B7640 #408B51

split-complementary

#40558B #8B5140 #7B8B40

monochromatic

#192237 #2D3B61 #40558B #5770B2 #8194C5

Accessibility & contrast

On white

7.27

#40558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#40558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40558B

7.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40558B	#FFFFFF	#000000	##FFFFFF
##40558B	1.00	7.27	2.89	7.27
#FFFFFF	7.27	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#405A8D

Deuteranopia (green-blind)

#37548A

Tritanopia (blue-blind)

#1B6169

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #40558b;
/* rgb */ color: rgb(64, 85, 139);
/* oklch */ color: oklch(45.8% 0.092 266.7);

Tailwind

colors: {
  custom: {
    50: '#7a84ad',
    500: '#40558b',
    950: '#000000',
  },
}

SCSS

$custom: #40558b;
$custom-light: #7a84ad;
$custom-dark: #000000;

JSON

{
  "hex": "#40558b",
  "rgb": {
    "r": 64,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 223.2,
    "s": 36.946,
    "l": 39.804
  },
  "oklch": {
    "l": 0.45839,
    "c": 0.09214,
    "h": 266.7
  },
  "luminance": 0.09451
}

Semantic roles & 50–950 ramp

primary

#40558B

secondary

#AFA078

accent

#AD5BCD

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#0A0A10

muted

#7C7C7F

Preview Lab

Preview with #40558B

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

Preview Lab → · Contrast checker → · Palette generator →