#303FB2#303FB2

#303FB2 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.181 H 270.8°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#303FB2
RGB	rgb(48, 63, 178)
HSL	hsl(233, 58%, 44%)
HSV	hsv(233, 73%, 70%)
CMYK	cmyk(73%, 64.6%, 0%, 30.2%)
CIE-LAB	lab(32.69, 34.00, -62.73)
CIE-LCH	lch(32.69, 71.35, 298.45°)
OKLab	oklab(43.33% 0.0026 -0.1813)
OKLCH	oklch(43.33% 0.181 270.8)
XYZ	xyz(11.0296, 7.3966, 42.9573)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FB2 #B2A330

analogous

#3080B2 #303FB2 #6230B2

triadic

#303FB2 #B2303F #3FB230

tetradic

#303FB2 #B23080 #B2A330 #30B262

square

#303FB2 #B23080 #B2A330 #30B262

split-complementary

#303FB2 #B26230 #80B230

monochromatic

#161D52 #232E82 #303FB2 #505ED0 #808ADD

Accessibility & contrast

On white

8.47

#303FB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#303FB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FB2

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FB2	#FFFFFF	#000000	##FFFFFF
##303FB2	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B6

Deuteranopia (green-blind)

#0047B0

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303fb2;
/* rgb */ color: rgb(48, 63, 178);
/* oklch */ color: oklch(43.3% 0.181 270.8);

Tailwind

colors: {
  custom: {
    50: '#7b74ca',
    500: '#303fb2',
    950: '#000000',
  },
}

SCSS

$custom: #303fb2;
$custom-light: #7b74ca;
$custom-dark: #000000;

JSON

{
  "hex": "#303fb2",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 178
  },
  "hsl": {
    "h": 233.077,
    "s": 57.522,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43334,
    "c": 0.18132,
    "h": 270.8
  },
  "luminance": 0.07398
}

Semantic roles & 50–950 ramp

primary

#303FB2

secondary

#C6BD78

accent

#CF47E1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303FB2

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

Preview Lab → · Contrast checker → · Palette generator →