#303BA4#303BA4

#303BA4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.3% C 0.167 H 272.1°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#303BA4
RGB	rgb(48, 59, 164)
HSL	hsl(234, 55%, 42%)
HSV	hsv(234, 71%, 64%)
CMYK	cmyk(70.7%, 64%, 0%, 35.7%)
CIE-LAB	lab(30.49, 31.52, -57.96)
CIE-LCH	lch(30.49, 65.98, 298.54°)
OKLab	oklab(41.34% 0.0062 -0.1674)
OKLCH	oklch(41.34% 0.167 272.1)
XYZ	xyz(9.4815, 6.4357, 35.8573)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303BA4 #A49930

analogous

#3075A4 #303BA4 #5F30A4

triadic

#303BA4 #A4303B #3BA430

tetradic

#303BA4 #A43075 #A49930 #30A45F

square

#303BA4 #A43075 #A49930 #30A45F

split-complementary

#303BA4 #A45F30 #75A430

monochromatic

#141945 #222A75 #303BA4 #4854C9 #7780D7

Accessibility & contrast

On white

9.18

#303BA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#303BA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BA4

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BA4	#FFFFFF	#000000	##FFFFFF
##303BA4	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA7

Deuteranopia (green-blind)

#0042A2

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303ba4;
/* rgb */ color: rgb(48, 59, 164);
/* oklch */ color: oklch(41.3% 0.167 272.1);

Tailwind

colors: {
  custom: {
    50: '#7871c0',
    500: '#303ba4',
    950: '#000000',
  },
}

SCSS

$custom: #303ba4;
$custom-light: #7871c0;
$custom-dark: #000000;

JSON

{
  "hex": "#303ba4",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 164
  },
  "hsl": {
    "h": 234.31,
    "s": 54.717,
    "l": 41.569
  },
  "oklch": {
    "l": 0.41337,
    "c": 0.16747,
    "h": 272.1
  },
  "luminance": 0.06437
}

Semantic roles & 50–950 ramp

primary

#303BA4

secondary

#BFB870

accent

#D04ADE

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #303BA4

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

Preview Lab → · Contrast checker → · Palette generator →