#28488F#28488F

#28488F is a dark, vivid blue. Relative luminance 0.071; OKLCH L 41.8% C 0.124 H 263.7°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#28488F
RGB	rgb(40, 72, 143)
HSL	hsl(221, 56%, 36%)
HSV	hsv(221, 72%, 56%)
CMYK	cmyk(72%, 49.7%, 0%, 43.9%)
CIE-LAB	lab(31.96, 13.74, -42.83)
CIE-LCH	lch(31.96, 44.98, 287.79°)
OKLab	oklab(41.82% -0.0136 -0.1229)
OKLCH	oklch(41.82% 0.124 263.7)
XYZ	xyz(8.1486, 7.0682, 26.9161)
Luminance	0.0707 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28488F #8F6F28

analogous

#287B8F #28488F #3B288F

triadic

#28488F #8F2848 #488F28

tetradic

#28488F #8F287B #8F6F28 #288F3B

square

#28488F #8F287B #8F6F28 #288F3B

split-complementary

#28488F #8F3B28 #7B8F28

monochromatic

#0D182F #1B305F #28488F #3560BF #5F83D2

Accessibility & contrast

On white

8.70

#28488F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#28488F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28488F

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28488F	#FFFFFF	#000000	##FFFFFF
##28488F	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#215092

Deuteranopia (green-blind)

#03478E

Tritanopia (blue-blind)

#005964

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #28488f;
/* rgb */ color: rgb(40, 72, 143);
/* oklch */ color: oklch(41.8% 0.124 263.7);

Tailwind

colors: {
  custom: {
    50: '#6f7ab0',
    500: '#28488f',
    950: '#000000',
  },
}

SCSS

$custom: #28488f;
$custom-light: #6f7ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#28488f",
  "rgb": {
    "r": 40,
    "g": 72,
    "b": 143
  },
  "hsl": {
    "h": 221.359,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.41818,
    "c": 0.12361,
    "h": 263.7
  },
  "luminance": 0.07069
}

Semantic roles & 50–950 ramp

primary

#28488F

secondary

#B89B5B

accent

#B148E0

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #28488F

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

Preview Lab → · Contrast checker → · Palette generator →