#28387B#28387B

#28387B is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.7% C 0.115 H 269.8°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#28387B
RGB	rgb(40, 56, 123)
HSL	hsl(228, 51%, 32%)
HSV	hsv(228, 67%, 48%)
CMYK	cmyk(67.5%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(25.89, 17.00, -40.19)
CIE-LCH	lch(25.89, 43.64, 292.93°)
OKLab	oklab(36.75% -0.0004 -0.1154)
OKLCH	oklch(36.75% 0.115 269.8)
XYZ	xyz(5.8632, 4.7090, 19.3350)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28387B #7B6B28

analogous

#28627B #28387B #42287B

triadic

#28387B #7B2838 #387B28

tetradic

#28387B #7B2862 #7B6B28 #287B42

square

#28387B #7B2862 #7B6B28 #287B42

split-complementary

#28387B #7B4228 #627B28

monochromatic

#0A0E1F #19234D #28387B #374DA9 #566CC8

Accessibility & contrast

On white

10.81

#28387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#28387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28387B

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28387B	#FFFFFF	#000000	##FFFFFF
##28387B	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E417D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #28387b;
/* rgb */ color: rgb(40, 56, 123);
/* oklch */ color: oklch(36.7% 0.115 269.8);

Tailwind

colors: {
  custom: {
    50: '#6c6ea2',
    500: '#28387b',
    950: '#000000',
  },
}

SCSS

$custom: #28387b;
$custom-light: #6c6ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#28387b",
  "rgb": {
    "r": 40,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 228.434,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.36748,
    "c": 0.11536,
    "h": 269.8
  },
  "luminance": 0.0471
}

Semantic roles & 50–950 ramp

primary

#28387B

secondary

#AD9B52

accent

#BF4DDA

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #28387B

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

Preview Lab → · Contrast checker → · Palette generator →