#303EA8#303EA8

#303EA8 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.169 H 271.3°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#303EA8
RGB	rgb(48, 62, 168)
HSL	hsl(233, 56%, 42%)
HSV	hsv(233, 71%, 66%)
CMYK	cmyk(71.4%, 63.1%, 0%, 34.1%)
CIE-LAB	lab(31.58, 31.02, -58.59)
CIE-LCH	lch(31.58, 66.29, 297.90°)
OKLab	oklab(42.25% 0.0038 -0.1691)
OKLCH	oklch(42.25% 0.169 271.3)
XYZ	xyz(10.0070, 6.8998, 37.8426)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EA8 #A89A30

analogous

#307AA8 #303EA8 #5E30A8

triadic

#303EA8 #A8303E #3EA830

tetradic

#303EA8 #A8307A #A89A30 #30A85E

square

#303EA8 #A8307A #A89A30 #30A85E

split-complementary

#303EA8 #A85E30 #7AA830

monochromatic

#151B49 #222C78 #303EA8 #4A59CB #7A85D9

Accessibility & contrast

On white

8.82

#303EA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#303EA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EA8

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EA8	#FFFFFF	#000000	##FFFFFF
##303EA8	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303ea8;
/* rgb */ color: rgb(48, 62, 168);
/* oklch */ color: oklch(42.2% 0.169 271.3);

Tailwind

colors: {
  custom: {
    50: '#7973c3',
    500: '#303ea8',
    950: '#000000',
  },
}

SCSS

$custom: #303ea8;
$custom-light: #7973c3;
$custom-dark: #000000;

JSON

{
  "hex": "#303ea8",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 168
  },
  "hsl": {
    "h": 233,
    "s": 55.556,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42246,
    "c": 0.16919,
    "h": 271.3
  },
  "luminance": 0.06901
}

Semantic roles & 50–950 ramp

primary

#303EA8

secondary

#C1B873

accent

#CD49DF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303EA8

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

Preview Lab → · Contrast checker → · Palette generator →