#28307B#28307B

#28307B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.1% C 0.126 H 273.4°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#28307B
RGB	rgb(40, 48, 123)
HSL	hsl(234, 51%, 32%)
HSV	hsv(234, 67%, 48%)
CMYK	cmyk(67.5%, 61%, 0%, 51.8%)
CIE-LAB	lab(23.65, 22.54, -43.82)
CIE-LCH	lch(23.65, 49.28, 297.23°)
OKLab	oklab(35.07% 0.0074 -0.1261)
OKLCH	oklch(35.07% 0.126 273.4)
XYZ	xyz(5.5060, 3.9946, 19.2159)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28307B #7B7328

analogous

#285A7B #28307B #4A287B

triadic

#28307B #7B2830 #307B28

tetradic

#28307B #7B285A #7B7328 #287B4A

square

#28307B #7B285A #7B7328 #287B4A

split-complementary

#28307B #7B4A28 #5A7B28

monochromatic

#0A0C1F #191E4D #28307B #3742A9 #5661C8

Accessibility & contrast

On white

11.67

#28307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#28307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28307B

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28307B	#FFFFFF	#000000	##FFFFFF
##28307B	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C7E

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004250

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #28307b;
/* rgb */ color: rgb(40, 48, 123);
/* oklch */ color: oklch(35.1% 0.126 273.4);

Tailwind

colors: {
  custom: {
    50: '#6d68a2',
    500: '#28307b',
    950: '#000000',
  },
}

SCSS

$custom: #28307b;
$custom-light: #6d68a2;
$custom-dark: #000000;

JSON

{
  "hex": "#28307b",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 234.217,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.35074,
    "c": 0.12635,
    "h": 273.4
  },
  "luminance": 0.03995
}

Semantic roles & 50–950 ramp

primary

#28307B

secondary

#ADA452

accent

#CD4DDA

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#08060F

muted

#7A7A7F

Preview Lab

Preview with #28307B

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

Preview Lab → · Contrast checker → · Palette generator →