#28388B#28388B

#28388B is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.139 H 270.2°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#28388B
RGB	rgb(40, 56, 139)
HSL	hsl(230, 55%, 35%)
HSV	hsv(230, 71%, 55%)
CMYK	cmyk(71.2%, 59.7%, 0%, 45.5%)
CIE-LAB	lab(27.14, 23.12, -48.17)
CIE-LCH	lch(27.14, 53.43, 295.64°)
OKLab	oklab(38.08% 0.0004 -0.1388)
OKLCH	oklch(38.08% 0.139 270.2)
XYZ	xyz(6.9479, 5.1429, 25.0476)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28388B #8B7B28

analogous

#28698B #28388B #49288B

triadic

#28388B #8B2838 #388B28

tetradic

#28388B #8B2869 #8B7B28 #288B49

square

#28388B #8B2869 #8B7B28 #288B49

split-complementary

#28388B #8B4928 #698B28

monochromatic

#0D122C #1A255B #28388B #364BBB #5D70D0

Accessibility & contrast

On white

10.35

#28388B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#28388B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28388B

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28388B	#FFFFFF	#000000	##FFFFFF
##28388B	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #28388b;
/* rgb */ color: rgb(40, 56, 139);
/* oklch */ color: oklch(38.1% 0.139 270.2);

Tailwind

colors: {
  custom: {
    50: '#706eae',
    500: '#28388b',
    950: '#000000',
  },
}

SCSS

$custom: #28388b;
$custom-light: #706eae;
$custom-dark: #000000;

JSON

{
  "hex": "#28388b",
  "rgb": {
    "r": 40,
    "g": 56,
    "b": 139
  },
  "hsl": {
    "h": 230.303,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.38079,
    "c": 0.13883,
    "h": 270.2
  },
  "luminance": 0.05144
}

Semantic roles & 50–950 ramp

primary

#28388B

secondary

#B6A759

accent

#C649DF

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #28388B

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

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