#28309E#28309E

#28309E is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.4% C 0.175 H 271.7°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#28309E
RGB	rgb(40, 48, 158)
HSL	hsl(236, 60%, 39%)
HSV	hsv(236, 75%, 62%)
CMYK	cmyk(74.7%, 69.6%, 0%, 38%)
CIE-LAB	lab(26.83, 35.44, -60.35)
CIE-LCH	lch(26.83, 69.98, 300.43°)
OKLab	oklab(38.38% 0.0051 -0.1746)
OKLCH	oklch(38.38% 0.175 271.7)
XYZ	xyz(8.1015, 5.0328, 32.8856)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28309E #9E9628

analogous

#286B9E #28309E #5B289E

triadic

#28309E #9E2830 #309E28

tetradic

#28309E #9E286B #9E9628 #289E5B

square

#28309E #9E286B #9E9628 #289E5B

split-complementary

#28309E #9E5B28 #6B9E28

monochromatic

#0F123C #1C216D #28309E #3741CC #686FD9

Accessibility & contrast

On white

10.46

#28309E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#28309E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28309E

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28309E	#FFFFFF	#000000	##FFFFFF
##28309E	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A1

Deuteranopia (green-blind)

#003A9C

Tritanopia (blue-blind)

#004E63

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #28309e;
/* rgb */ color: rgb(40, 48, 158);
/* oklch */ color: oklch(38.4% 0.175 271.7);

Tailwind

colors: {
  custom: {
    50: '#7569bc',
    500: '#28309e',
    950: '#000000',
  },
}

SCSS

$custom: #28309e;
$custom-light: #7569bc;
$custom-dark: #000000;

JSON

{
  "hex": "#28309e",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 158
  },
  "hsl": {
    "h": 235.932,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.38377,
    "c": 0.17465,
    "h": 271.7
  },
  "luminance": 0.05034
}

Semantic roles & 50–950 ramp

primary

#28309E

secondary

#BFB963

accent

#D845E3

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #28309E

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

Preview Lab → · Contrast checker → · Palette generator →