#28308C#28308C

#28308C is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.6% C 0.150 H 272.6°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#28308C
RGB	rgb(40, 48, 140)
HSL	hsl(235, 56%, 35%)
HSV	hsv(235, 71%, 55%)
CMYK	cmyk(71.4%, 65.7%, 0%, 45.1%)
CIE-LAB	lab(25.13, 28.89, -52.07)
CIE-LCH	lch(25.13, 59.54, 299.02°)
OKLab	oklab(36.62% 0.0068 -0.1503)
OKLCH	oklch(36.62% 0.15 272.6)
XYZ	xyz(6.6641, 4.4578, 25.3151)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28308C #8C8428

analogous

#28628C #28308C #52288C

triadic

#28308C #8C2830 #308C28

tetradic

#28308C #8C2862 #8C8428 #288C52

square

#28308C #8C2862 #8C8428 #288C52

split-complementary

#28308C #8C5228 #628C28

monochromatic

#0D0F2D #1A205C #28308C #3640BC #5E67D1

Accessibility & contrast

On white

11.10

#28308C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#28308C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28308C

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28308C	#FFFFFF	#000000	##FFFFFF
##28308C	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408F

Deuteranopia (green-blind)

#00378A

Tritanopia (blue-blind)

#004859

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #28308c;
/* rgb */ color: rgb(40, 48, 140);
/* oklch */ color: oklch(36.6% 0.150 272.6);

Tailwind

colors: {
  custom: {
    50: '#7068ae',
    500: '#28308c',
    950: '#000000',
  },
}

SCSS

$custom: #28308c;
$custom-light: #7068ae;
$custom-dark: #000000;

JSON

{
  "hex": "#28308c",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 140
  },
  "hsl": {
    "h": 235.2,
    "s": 55.556,
    "l": 35.294
  },
  "oklch": {
    "l": 0.36622,
    "c": 0.15049,
    "h": 272.6
  },
  "luminance": 0.04458
}

Semantic roles & 50–950 ramp

primary

#28308C

secondary

#B6AF5A

accent

#D349DF

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #28308C

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

Preview Lab → · Contrast checker → · Palette generator →