#303B87#303B87

#303B87 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.127 H 272.9°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#303B87
RGB	rgb(48, 59, 135)
HSL	hsl(232, 48%, 36%)
HSV	hsv(232, 64%, 53%)
CMYK	cmyk(64.4%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(28.13, 20.91, -44.06)
CIE-LCH	lch(28.13, 48.77, 295.39°)
OKLab	oklab(38.85% 0.0063 -0.1265)
OKLCH	oklch(38.85% 0.127 272.9)
XYZ	xyz(7.1546, 5.5050, 23.6025)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303B87 #877C30

analogous

#306687 #303B87 #503087

triadic

#303B87 #87303B #3B8730

tetradic

#303B87 #873066 #877C30 #308750

square

#303B87 #873066 #877C30 #308750

split-complementary

#303B87 #875030 #668730

monochromatic

#10142D #20275A #303B87 #404FB4 #6874C9

Accessibility & contrast

On white

9.99

#303B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#303B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303B87

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303B87	#FFFFFF	#000000	##FFFFFF
##303B87	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03468A

Deuteranopia (green-blind)

#003F85

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #303b87;
/* rgb */ color: rgb(48, 59, 135);
/* oklch */ color: oklch(38.8% 0.127 272.9);

Tailwind

colors: {
  custom: {
    50: '#7270ab',
    500: '#303b87',
    950: '#000000',
  },
}

SCSS

$custom: #303b87;
$custom-light: #7270ab;
$custom-dark: #000000;

JSON

{
  "hex": "#303b87",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 232.414,
    "s": 47.541,
    "l": 35.882
  },
  "oklch": {
    "l": 0.38849,
    "c": 0.12666,
    "h": 272.9
  },
  "luminance": 0.05506
}

Semantic roles & 50–950 ramp

primary

#303B87

secondary

#B1A762

accent

#C651D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303B87

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

Preview Lab → · Contrast checker → · Palette generator →