#28309A#28309A

#28309A is a dark, vivid blue. Relative luminance 0.049; OKLCH L 38.0% C 0.169 H 271.9°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#28309A
RGB	rgb(40, 48, 154)
HSL	hsl(236, 59%, 38%)
HSV	hsv(236, 74%, 60%)
CMYK	cmyk(74%, 68.8%, 0%, 39.6%)
CIE-LAB	lab(26.44, 34.00, -58.54)
CIE-LCH	lch(26.44, 67.70, 300.15°)
OKLab	oklab(37.98% 0.0056 -0.1693)
OKLCH	oklch(37.98% 0.169 271.9)
XYZ	xyz(7.7628, 4.8973, 31.1018)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28309A #9A9228

analogous

#28699A #28309A #59289A

triadic

#28309A #9A2830 #309A28

tetradic

#28309A #9A2869 #9A9228 #289A59

square

#28309A #9A2869 #9A9228 #289A59

split-complementary

#28309A #9A5928 #699A28

monochromatic

#0F1239 #1B2169 #28309A #353FCA #656DD7

Accessibility & contrast

On white

10.61

#28309A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#28309A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28309A

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28309A	#FFFFFF	#000000	##FFFFFF
##28309A	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449D

Deuteranopia (green-blind)

#003998

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #28309a;
/* rgb */ color: rgb(40, 48, 154);
/* oklch */ color: oklch(38.0% 0.169 271.9);

Tailwind

colors: {
  custom: {
    50: '#7469b9',
    500: '#28309a',
    950: '#000000',
  },
}

SCSS

$custom: #28309a;
$custom-light: #7469b9;
$custom-dark: #000000;

JSON

{
  "hex": "#28309a",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 154
  },
  "hsl": {
    "h": 235.789,
    "s": 58.763,
    "l": 38.039
  },
  "oklch": {
    "l": 0.37978,
    "c": 0.16939,
    "h": 271.9
  },
  "luminance": 0.04898
}

Semantic roles & 50–950 ramp

primary

#28309A

secondary

#BDB761

accent

#D746E2

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #28309A

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

Preview Lab → · Contrast checker → · Palette generator →