#303F8A#303F8A

#303F8A is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.9% C 0.126 H 271.1°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#303F8A
RGB	rgb(48, 63, 138)
HSL	hsl(230, 48%, 36%)
HSV	hsv(230, 65%, 54%)
CMYK	cmyk(65.2%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(29.46, 19.30, -43.77)
CIE-LCH	lch(29.46, 47.84, 293.80°)
OKLab	oklab(39.92% 0.0025 -0.1256)
OKLCH	oklch(39.92% 0.126 271.1)
XYZ	xyz(7.5823, 6.0177, 24.8018)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303F8A #8A7B30

analogous

#306C8A #303F8A #4E308A

triadic

#303F8A #8A303F #3F8A30

tetradic

#303F8A #8A306C #8A7B30 #308A4E

square

#303F8A #8A306C #8A7B30 #308A4E

split-complementary

#303F8A #8A4E30 #6C8A30

monochromatic

#10162F #202A5D #303F8A #4054B7 #697ACB

Accessibility & contrast

On white

9.53

#303F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#303F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303F8A

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303F8A	#FFFFFF	#000000	##FFFFFF
##303F8A	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4A8D

Deuteranopia (green-blind)

#004288

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #303f8a;
/* rgb */ color: rgb(48, 63, 138);
/* oklch */ color: oklch(39.9% 0.126 271.1);

Tailwind

colors: {
  custom: {
    50: '#7273ad',
    500: '#303f8a',
    950: '#000000',
  },
}

SCSS

$custom: #303f8a;
$custom-light: #7273ad;
$custom-dark: #000000;

JSON

{
  "hex": "#303f8a",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 230,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39919,
    "c": 0.12562,
    "h": 271.1
  },
  "luminance": 0.06018
}

Semantic roles & 50–950 ramp

primary

#303F8A

secondary

#B2A564

accent

#C150D8

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #303F8A

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

Preview Lab → · Contrast checker → · Palette generator →