#303C8A#303C8A

#303C8A is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.3% C 0.130 H 272.4°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#303C8A
RGB	rgb(48, 60, 138)
HSL	hsl(232, 48%, 36%)
HSV	hsv(232, 65%, 54%)
CMYK	cmyk(65.2%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(28.63, 21.34, -45.11)
CIE-LCH	lch(28.63, 49.90, 295.32°)
OKLab	oklab(39.3% 0.0055 -0.1296)
OKLCH	oklch(39.3% 0.13 272.4)
XYZ	xyz(7.4207, 5.6944, 24.7479)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C8A #8A7E30

analogous

#30698A #303C8A #51308A

triadic

#303C8A #8A303C #3C8A30

tetradic

#303C8A #8A3069 #8A7E30 #308A51

square

#303C8A #8A3069 #8A7E30 #308A51

split-complementary

#303C8A #8A5130 #698A30

monochromatic

#10152F #20285D #303C8A #4050B7 #6976CB

Accessibility & contrast

On white

9.82

#303C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#303C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C8A

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C8A	#FFFFFF	#000000	##FFFFFF
##303C8A	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488D

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303c8a;
/* rgb */ color: rgb(48, 60, 138);
/* oklch */ color: oklch(39.3% 0.130 272.4);

Tailwind

colors: {
  custom: {
    50: '#7371ad',
    500: '#303c8a',
    950: '#000000',
  },
}

SCSS

$custom: #303c8a;
$custom-light: #7371ad;
$custom-dark: #000000;

JSON

{
  "hex": "#303c8a",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 232,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39296,
    "c": 0.12969,
    "h": 272.4
  },
  "luminance": 0.05695
}

Semantic roles & 50–950 ramp

primary

#303C8A

secondary

#B2A864

accent

#C650D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303C8A

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

Preview Lab → · Contrast checker → · Palette generator →