#303C87#303C87

#303C87 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.125 H 272.4°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#303C87
RGB	rgb(48, 60, 135)
HSL	hsl(232, 48%, 36%)
HSV	hsv(232, 64%, 53%)
CMYK	cmyk(64.4%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(28.40, 20.23, -43.61)
CIE-LCH	lch(28.40, 48.08, 294.88°)
OKLab	oklab(39.06% 0.0053 -0.1252)
OKLCH	oklch(39.06% 0.125 272.4)
XYZ	xyz(7.2065, 5.6088, 23.6198)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C87 #877B30

analogous

#306787 #303C87 #4F3087

triadic

#303C87 #87303C #3C8730

tetradic

#303C87 #873067 #877B30 #30874F

square

#303C87 #873067 #877B30 #30874F

split-complementary

#303C87 #874F30 #678730

monochromatic

#10142D #20285A #303C87 #4050B4 #6875C9

Accessibility & contrast

On white

9.90

#303C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#303C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C87

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C87	#FFFFFF	#000000	##FFFFFF
##303C87	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08478A

Deuteranopia (green-blind)

#003F85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303c87;
/* rgb */ color: rgb(48, 60, 135);
/* oklch */ color: oklch(39.1% 0.125 272.4);

Tailwind

colors: {
  custom: {
    50: '#7271aa',
    500: '#303c87',
    950: '#000000',
  },
}

SCSS

$custom: #303c87;
$custom-light: #7271aa;
$custom-dark: #000000;

JSON

{
  "hex": "#303c87",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 231.724,
    "s": 47.541,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39056,
    "c": 0.12529,
    "h": 272.4
  },
  "luminance": 0.05609
}

Semantic roles & 50–950 ramp

primary

#303C87

secondary

#B1A662

accent

#C551D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #303C87

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

Preview Lab → · Contrast checker → · Palette generator →