#303B89#303B89

#303B89 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.0% C 0.130 H 272.8°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#303B89
RGB	rgb(48, 59, 137)
HSL	hsl(233, 48%, 36%)
HSV	hsv(233, 65%, 54%)
CMYK	cmyk(65%, 56.9%, 0%, 46.3%)
CIE-LAB	lab(28.28, 21.65, -45.06)
CIE-LCH	lch(28.28, 49.99, 295.66°)
OKLab	oklab(39.01% 0.0064 -0.1294)
OKLCH	oklch(39.01% 0.13 272.8)
XYZ	xyz(7.2967, 5.5618, 24.3511)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303B89 #897E30

analogous

#306889 #303B89 #523089

triadic

#303B89 #89303B #3B8930

tetradic

#303B89 #893068 #897E30 #308952

square

#303B89 #893068 #897E30 #308952

split-complementary

#303B89 #895230 #688930

monochromatic

#10142E #20275C #303B89 #404FB6 #6975CA

Accessibility & contrast

On white

9.94

#303B89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#303B89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303B89

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303B89	#FFFFFF	#000000	##FFFFFF
##303B89	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003F87

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303b89;
/* rgb */ color: rgb(48, 59, 137);
/* oklch */ color: oklch(39.0% 0.130 272.8);

Tailwind

colors: {
  custom: {
    50: '#7270ac',
    500: '#303b89',
    950: '#000000',
  },
}

SCSS

$custom: #303b89;
$custom-light: #7270ac;
$custom-dark: #000000;

JSON

{
  "hex": "#303b89",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 137
  },
  "hsl": {
    "h": 232.584,
    "s": 48.108,
    "l": 36.275
  },
  "oklch": {
    "l": 0.3901,
    "c": 0.12959,
    "h": 272.8
  },
  "luminance": 0.05562
}

Semantic roles & 50–950 ramp

primary

#303B89

secondary

#B2A863

accent

#C750D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303B89

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

Preview Lab → · Contrast checker → · Palette generator →