#303EB1#303EB1

#303EB1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.181 H 271.0°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#303EB1
RGB	rgb(48, 62, 177)
HSL	hsl(233, 57%, 44%)
HSV	hsv(233, 73%, 69%)
CMYK	cmyk(72.9%, 65%, 0%, 30.6%)
CIE-LAB	lab(32.36, 34.28, -62.68)
CIE-LCH	lch(32.36, 71.44, 298.67°)
OKLab	oklab(43.07% 0.0033 -0.1811)
OKLCH	oklch(43.07% 0.181 271)
XYZ	xyz(10.8747, 7.2468, 42.4121)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.80

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EB1 #B1A330

analogous

#307FB1 #303EB1 #6330B1

triadic

#303EB1 #B1303E #3EB130

tetradic

#303EB1 #B1307F #B1A330 #30B163

square

#303EB1 #B1307F #B1A330 #30B163

split-complementary

#303EB1 #B16330 #7FB130

monochromatic

#161C51 #232D81 #303EB1 #4F5DCF #7F89DC

Accessibility & contrast

On white

8.57

#303EB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#303EB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EB1

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EB1	#FFFFFF	#000000	##FFFFFF
##303EB1	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303eb1;
/* rgb */ color: rgb(48, 62, 177);
/* oklch */ color: oklch(43.1% 0.181 271.0);

Tailwind

colors: {
  custom: {
    50: '#7b73c9',
    500: '#303eb1',
    950: '#000000',
  },
}

SCSS

$custom: #303eb1;
$custom-light: #7b73c9;
$custom-dark: #000000;

JSON

{
  "hex": "#303eb1",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 177
  },
  "hsl": {
    "h": 233.488,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43065,
    "c": 0.18118,
    "h": 271
  },
  "luminance": 0.07248
}

Semantic roles & 50–950 ramp

primary

#303EB1

secondary

#C5BD78

accent

#D047E1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303EB1

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

Preview Lab → · Contrast checker → · Palette generator →