#28307D#28307D

#28307D is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.3% C 0.129 H 273.3°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#28307D
RGB	rgb(40, 48, 125)
HSL	hsl(234, 52%, 32%)
HSV	hsv(234, 68%, 49%)
CMYK	cmyk(68%, 61.6%, 0%, 51%)
CIE-LAB	lab(23.82, 23.30, -44.81)
CIE-LCH	lch(23.82, 50.50, 297.47°)
OKLab	oklab(35.25% 0.0074 -0.129)
OKLCH	oklch(35.25% 0.129 273.3)
XYZ	xyz(5.6325, 4.0452, 19.8820)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28307D #7D7528

analogous

#285B7D #28307D #4B287D

triadic

#28307D #7D2830 #307D28

tetradic

#28307D #7D285B #7D7528 #287D4B

square

#28307D #7D285B #7D7528 #287D4B

split-complementary

#28307D #7D4B28 #5B7D28

monochromatic

#0A0C20 #191E4F #28307D #3742AB #5661C9

Accessibility & contrast

On white

11.61

#28307D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#28307D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28307D

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28307D	#FFFFFF	#000000	##FFFFFF
##28307D	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D80

Deuteranopia (green-blind)

#00357B

Tritanopia (blue-blind)

#004351

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #28307d;
/* rgb */ color: rgb(40, 48, 125);
/* oklch */ color: oklch(35.3% 0.129 273.3);

Tailwind

colors: {
  custom: {
    50: '#6d68a3',
    500: '#28307d',
    950: '#000000',
  },
}

SCSS

$custom: #28307d;
$custom-light: #6d68a3;
$custom-dark: #000000;

JSON

{
  "hex": "#28307d",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 125
  },
  "hsl": {
    "h": 234.353,
    "s": 51.515,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3525,
    "c": 0.12926,
    "h": 273.3
  },
  "luminance": 0.04046
}

Semantic roles & 50–950 ramp

primary

#28307D

secondary

#AEA553

accent

#CE4DDB

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#08060F

muted

#7A7A7F

Preview Lab

Preview with #28307D

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

Preview Lab → · Contrast checker → · Palette generator →