#2B288B#2B288B

#2B288B is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.3% C 0.158 H 276.0°. Best body text is #FFFFFF at 11.80:1 contrast (WCAG AA passes).

Color values

HEX	#2B288B
RGB	rgb(43, 40, 139)
HSL	hsl(242, 55%, 35%)
HSV	hsv(242, 71%, 55%)
CMYK	cmyk(69.1%, 71.2%, 0%, 45.5%)
CIE-LAB	lab(23.32, 34.08, -54.40)
CIE-LCH	lch(23.32, 64.20, 302.06°)
OKLab	oklab(35.33% 0.0164 -0.1571)
OKLCH	oklch(35.33% 0.158 276)
XYZ	xyz(6.4137, 3.8947, 24.8348)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B288B #888B28

analogous

#28578B #2B288B #5C288B

triadic

#2B288B #8B2B28 #288B2B

tetradic

#2B288B #8B2857 #888B28 #288B5C

square

#2B288B #8B2857 #888B28 #288B5C

split-complementary

#2B288B #8B5C28 #578B28

monochromatic

#0E0D2C #1C1A5B #2B288B #3A36BB #615DD0

Accessibility & contrast

On white

11.80

#2B288B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#2B288B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B288B

11.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B288B	#FFFFFF	#000000	##FFFFFF
##2B288B	1.00	11.80	1.78	11.80
#FFFFFF	11.80	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003389

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #2b288b;
/* rgb */ color: rgb(43, 40, 139);
/* oklch */ color: oklch(35.3% 0.158 276.0);

Tailwind

colors: {
  custom: {
    50: '#7263ae',
    500: '#2b288b',
    950: '#000000',
  },
}

SCSS

$custom: #2b288b;
$custom-light: #7263ae;
$custom-dark: #000000;

JSON

{
  "hex": "#2b288b",
  "rgb": {
    "r": 43,
    "g": 40,
    "b": 139
  },
  "hsl": {
    "h": 241.818,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.35333,
    "c": 0.15799,
    "h": 276
  },
  "luminance": 0.03895
}

Semantic roles & 50–950 ramp

primary

#2B288B

secondary

#B3B659

accent

#DF49DA

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#090510

muted

#7B797F

Preview Lab

Preview with #2B288B

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

Preview Lab → · Contrast checker → · Palette generator →