#28388F#28388F

#28388F is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.145 H 270.2°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#28388F
RGB	rgb(40, 56, 143)
HSL	hsl(231, 56%, 36%)
HSV	hsv(231, 72%, 56%)
CMYK	cmyk(72%, 60.8%, 0%, 43.9%)
CIE-LAB	lab(27.47, 24.64, -50.11)
CIE-LCH	lch(27.47, 55.84, 296.19°)
OKLab	oklab(38.43% 0.0004 -0.1445)
OKLCH	oklch(38.43% 0.145 270.2)
XYZ	xyz(7.2455, 5.2619, 26.6151)
Luminance	0.0526 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28388F #8F7F28

analogous

#286B8F #28388F #4B288F

triadic

#28388F #8F2838 #388F28

tetradic

#28388F #8F286B #8F7F28 #288F4B

square

#28388F #8F286B #8F7F28 #288F4B

split-complementary

#28388F #8F4B28 #6B8F28

monochromatic

#0D132F #1B255F #28388F #354BBF #5F71D2

Accessibility & contrast

On white

10.23

#28388F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#28388F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28388F

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28388F	#FFFFFF	#000000	##FFFFFF
##28388F	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003C8D

Tritanopia (blue-blind)

#004E5E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #28388f;
/* rgb */ color: rgb(40, 56, 143);
/* oklch */ color: oklch(38.4% 0.145 270.2);

Tailwind

colors: {
  custom: {
    50: '#706eb1',
    500: '#28388f',
    950: '#000000',
  },
}

SCSS

$custom: #28388f;
$custom-light: #706eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#28388f",
  "rgb": {
    "r": 40,
    "g": 56,
    "b": 143
  },
  "hsl": {
    "h": 230.68,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.38428,
    "c": 0.14451,
    "h": 270.2
  },
  "luminance": 0.05263
}

Semantic roles & 50–950 ramp

primary

#28388F

secondary

#B8A95B

accent

#C848E0

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #28388F

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

Preview Lab → · Contrast checker → · Palette generator →