#28308F#28308F

#28308F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.9% C 0.155 H 272.4°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#28308F
RGB	rgb(40, 48, 143)
HSL	hsl(235, 56%, 36%)
HSV	hsv(235, 72%, 56%)
CMYK	cmyk(72%, 66.4%, 0%, 43.9%)
CIE-LAB	lab(25.40, 29.99, -53.48)
CIE-LCH	lch(25.40, 61.31, 299.29°)
OKLab	oklab(36.91% 0.0066 -0.1545)
OKLCH	oklch(36.91% 0.155 272.4)
XYZ	xyz(6.8883, 4.5475, 26.4960)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28308F #8F8728

analogous

#28638F #28308F #53288F

triadic

#28308F #8F2830 #308F28

tetradic

#28308F #8F2863 #8F8728 #288F53

square

#28308F #8F2863 #8F8728 #288F53

split-complementary

#28308F #8F5328 #638F28

monochromatic

#0D102F #1B205F #28308F #3540BF #5F68D2

Accessibility & contrast

On white

11.00

#28308F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#28308F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28308F

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28308F	#FFFFFF	#000000	##FFFFFF
##28308F	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004192

Deuteranopia (green-blind)

#00378D

Tritanopia (blue-blind)

#00495B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #28308f;
/* rgb */ color: rgb(40, 48, 143);
/* oklch */ color: oklch(36.9% 0.155 272.4);

Tailwind

colors: {
  custom: {
    50: '#7168b1',
    500: '#28308f',
    950: '#000000',
  },
}

SCSS

$custom: #28308f;
$custom-light: #7168b1;
$custom-dark: #000000;

JSON

{
  "hex": "#28308f",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 143
  },
  "hsl": {
    "h": 235.34,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.36907,
    "c": 0.15462,
    "h": 272.4
  },
  "luminance": 0.04548
}

Semantic roles & 50–950 ramp

primary

#28308F

secondary

#B8B15B

accent

#D448E0

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #28308F

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

Preview Lab → · Contrast checker → · Palette generator →