#28398B#28398B

#28398B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.3% C 0.138 H 269.8°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#28398B
RGB	rgb(40, 57, 139)
HSL	hsl(230, 55%, 35%)
HSV	hsv(230, 71%, 55%)
CMYK	cmyk(71.2%, 59%, 0%, 45.5%)
CIE-LAB	lab(27.41, 22.44, -47.73)
CIE-LCH	lch(27.41, 52.74, 295.18°)
OKLab	oklab(38.28% -0.0005 -0.1375)
OKLCH	oklch(38.28% 0.138 269.8)
XYZ	xyz(6.9968, 5.2408, 25.0639)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28398B #8B7A28

analogous

#286A8B #28398B #49288B

triadic

#28398B #8B2839 #398B28

tetradic

#28398B #8B286A #8B7A28 #288B49

square

#28398B #8B286A #8B7A28 #288B49

split-complementary

#28398B #8B4928 #6A8B28

monochromatic

#0D122C #1A265B #28398B #364CBB #5D71D0

Accessibility & contrast

On white

10.25

#28398B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#28398B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28398B

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28398B	#FFFFFF	#000000	##FFFFFF
##28398B	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #28398b;
/* rgb */ color: rgb(40, 57, 139);
/* oklch */ color: oklch(38.3% 0.138 269.8);

Tailwind

colors: {
  custom: {
    50: '#6f6fae',
    500: '#28398b',
    950: '#000000',
  },
}

SCSS

$custom: #28398b;
$custom-light: #6f6fae;
$custom-dark: #000000;

JSON

{
  "hex": "#28398b",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 139
  },
  "hsl": {
    "h": 229.697,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.38282,
    "c": 0.13751,
    "h": 269.8
  },
  "luminance": 0.05241
}

Semantic roles & 50–950 ramp

primary

#28398B

secondary

#B6A659

accent

#C549DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #28398B

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

Preview Lab → · Contrast checker → · Palette generator →