#303FA8#303FA8

#303FA8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.168 H 271.0°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#303FA8
RGB	rgb(48, 63, 168)
HSL	hsl(233, 56%, 42%)
HSV	hsv(233, 71%, 66%)
CMYK	cmyk(71.4%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(31.83, 30.37, -58.18)
CIE-LCH	lch(31.83, 65.63, 297.57°)
OKLab	oklab(42.43% 0.003 -0.1679)
OKLCH	oklch(42.43% 0.168 271)
XYZ	xyz(10.0619, 7.0095, 37.8609)
Luminance	0.0701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FA8 #A89930

analogous

#307BA8 #303FA8 #5D30A8

triadic

#303FA8 #A8303F #3FA830

tetradic

#303FA8 #A8307B #A89930 #30A85D

square

#303FA8 #A8307B #A89930 #30A85D

split-complementary

#303FA8 #A85D30 #7BA830

monochromatic

#151B49 #222D78 #303FA8 #4A5ACB #7A85D9

Accessibility & contrast

On white

8.74

#303FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#303FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FA8

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FA8	#FFFFFF	#000000	##FFFFFF
##303FA8	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303fa8;
/* rgb */ color: rgb(48, 63, 168);
/* oklch */ color: oklch(42.4% 0.168 271.0);

Tailwind

colors: {
  custom: {
    50: '#7974c3',
    500: '#303fa8',
    950: '#000000',
  },
}

SCSS

$custom: #303fa8;
$custom-light: #7974c3;
$custom-dark: #000000;

JSON

{
  "hex": "#303fa8",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 232.5,
    "s": 55.556,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42431,
    "c": 0.16797,
    "h": 271
  },
  "luminance": 0.07011
}

Semantic roles & 50–950 ramp

primary

#303FA8

secondary

#C1B773

accent

#CC49DF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303FA8

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

Preview Lab → · Contrast checker → · Palette generator →