#303C88#303C88

#303C88 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.127 H 272.4°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#303C88
RGB	rgb(48, 60, 136)
HSL	hsl(232, 48%, 36%)
HSV	hsv(232, 65%, 53%)
CMYK	cmyk(64.7%, 55.9%, 0%, 46.7%)
CIE-LAB	lab(28.48, 20.60, -44.11)
CIE-LCH	lch(28.48, 48.69, 295.03°)
OKLab	oklab(39.14% 0.0054 -0.1267)
OKLCH	oklch(39.14% 0.127 272.4)
XYZ	xyz(7.2772, 5.6371, 23.9923)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C88 #887C30

analogous

#306888 #303C88 #503088

triadic

#303C88 #88303C #3C8830

tetradic

#303C88 #883068 #887C30 #308850

square

#303C88 #883068 #887C30 #308850

split-complementary

#303C88 #885030 #688830

monochromatic

#10142E #20285B #303C88 #4050B5 #6976CA

Accessibility & contrast

On white

9.87

#303C88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#303C88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C88

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C88	#FFFFFF	#000000	##FFFFFF
##303C88	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05478B

Deuteranopia (green-blind)

#003F86

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303c88;
/* rgb */ color: rgb(48, 60, 136);
/* oklch */ color: oklch(39.1% 0.127 272.4);

Tailwind

colors: {
  custom: {
    50: '#7271ab',
    500: '#303c88',
    950: '#000000',
  },
}

SCSS

$custom: #303c88;
$custom-light: #7271ab;
$custom-dark: #000000;

JSON

{
  "hex": "#303c88",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 136
  },
  "hsl": {
    "h": 231.818,
    "s": 47.826,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39135,
    "c": 0.12676,
    "h": 272.4
  },
  "luminance": 0.05638
}

Semantic roles & 50–950 ramp

primary

#303C88

secondary

#B1A663

accent

#C550D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303C88

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

Preview Lab → · Contrast checker → · Palette generator →