#303FAF#303FAF

#303FAF is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.177 H 270.9°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#303FAF
RGB	rgb(48, 63, 175)
HSL	hsl(233, 57%, 44%)
HSV	hsv(233, 73%, 69%)
CMYK	cmyk(72.6%, 64%, 0%, 31.4%)
CIE-LAB	lab(32.43, 32.91, -61.38)
CIE-LCH	lch(32.43, 69.65, 298.20°)
OKLab	oklab(43.06% 0.0028 -0.1773)
OKLCH	oklch(43.06% 0.177 270.9)
XYZ	xyz(10.7317, 7.2774, 41.3882)
Luminance	0.0728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FAF #AFA030

analogous

#307EAF #303FAF #6030AF

triadic

#303FAF #AF303F #3FAF30

tetradic

#303FAF #AF307E #AFA030 #30AF60

square

#303FAF #AF307E #AFA030 #30AF60

split-complementary

#303FAF #AF6030 #7EAF30

monochromatic

#161C4F #232E7F #303FAF #4E5DCE #7E89DC

Accessibility & contrast

On white

8.55

#303FAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#303FAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FAF

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FAF	#FFFFFF	#000000	##FFFFFF
##303FAF	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B3

Deuteranopia (green-blind)

#0046AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303faf;
/* rgb */ color: rgb(48, 63, 175);
/* oklch */ color: oklch(43.1% 0.177 270.9);

Tailwind

colors: {
  custom: {
    50: '#7b74c8',
    500: '#303faf',
    950: '#000000',
  },
}

SCSS

$custom: #303faf;
$custom-light: #7b74c8;
$custom-dark: #000000;

JSON

{
  "hex": "#303faf",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 175
  },
  "hsl": {
    "h": 232.913,
    "s": 56.951,
    "l": 43.725
  },
  "oklch": {
    "l": 0.43061,
    "c": 0.17735,
    "h": 270.9
  },
  "luminance": 0.07279
}

Semantic roles & 50–950 ramp

primary

#303FAF

secondary

#C4BB76

accent

#CE48E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303FAF

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

Preview Lab → · Contrast checker → · Palette generator →