#40579B#40579B

#40579B is a mid, moderate blue. Relative luminance 0.103; OKLCH L 47.3% C 0.113 H 267.8°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#40579B
RGB	rgb(64, 87, 155)
HSL	hsl(225, 42%, 43%)
HSV	hsv(225, 59%, 61%)
CMYK	cmyk(58.7%, 43.9%, 0%, 39.2%)
CIE-LAB	lab(38.33, 12.68, -39.84)
CIE-LCH	lch(38.33, 41.81, 287.66°)
OKLab	oklab(47.28% -0.0043 -0.1134)
OKLCH	oklch(47.28% 0.113 267.8)
XYZ	xyz(11.4370, 10.2720, 32.3840)
Luminance	0.1027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40579B #9B8440

analogous

#40849B #40579B #56409B

triadic

#40579B #9B4057 #579B40

tetradic

#40579B #9B4084 #9B8440 #409B56

square

#40579B #9B4084 #9B8440 #409B56

split-complementary

#40579B #9B5640 #849B40

monochromatic

#1C2644 #2E3F70 #40579B #5C74BC #8899CE

Accessibility & contrast

On white

6.87

#40579B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#40579B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #40579B

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40579B	#FFFFFF	#000000	##FFFFFF
##40579B	1.00	6.87	3.05	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#395F9E

Deuteranopia (green-blind)

#2D569A

Tritanopia (blue-blind)

#006671

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #40579b;
/* rgb */ color: rgb(64, 87, 155);
/* oklch */ color: oklch(47.3% 0.113 267.8);

Tailwind

colors: {
  custom: {
    50: '#7c86b9',
    500: '#40579b',
    950: '#000000',
  },
}

SCSS

$custom: #40579b;
$custom-light: #7c86b9;
$custom-dark: #000000;

JSON

{
  "hex": "#40579b",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 155
  },
  "hsl": {
    "h": 224.835,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.47282,
    "c": 0.11344,
    "h": 267.8
  },
  "luminance": 0.10273
}

Semantic roles & 50–950 ramp

primary

#40579B

secondary

#B8AA7E

accent

#B256D1

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #40579B

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

Preview Lab → · Contrast checker → · Palette generator →