#303BB0#303BB0

#303BB0 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.183 H 271.7°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#303BB0
RGB	rgb(48, 59, 176)
HSL	hsl(235, 57%, 44%)
HSV	hsv(235, 73%, 69%)
CMYK	cmyk(72.7%, 66.5%, 0%, 31%)
CIE-LAB	lab(31.55, 35.82, -63.41)
CIE-LCH	lch(31.55, 72.83, 299.46°)
OKLab	oklab(42.45% 0.0054 -0.1833)
OKLCH	oklch(42.45% 0.183 271.7)
XYZ	xyz(10.6167, 6.8898, 41.8362)
Luminance	0.0689 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303BB0 #B0A530

analogous

#307BB0 #303BB0 #6530B0

triadic

#303BB0 #B0303B #3BB030

tetradic

#303BB0 #B0307B #B0A530 #30B065

square

#303BB0 #B0307B #B0A530 #30B065

split-complementary

#303BB0 #B06530 #7BB030

monochromatic

#161B50 #232B80 #303BB0 #4E59CF #7E86DC

Accessibility & contrast

On white

8.83

#303BB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#303BB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BB0

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BB0	#FFFFFF	#000000	##FFFFFF
##303BB0	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0044AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303bb0;
/* rgb */ color: rgb(48, 59, 176);
/* oklch */ color: oklch(42.4% 0.183 271.7);

Tailwind

colors: {
  custom: {
    50: '#7b71c9',
    500: '#303bb0',
    950: '#000000',
  },
}

SCSS

$custom: #303bb0;
$custom-light: #7b71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#303bb0",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 176
  },
  "hsl": {
    "h": 234.844,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.42447,
    "c": 0.18338,
    "h": 271.7
  },
  "luminance": 0.06891
}

Semantic roles & 50–950 ramp

primary

#303BB0

secondary

#C5BE77

accent

#D347E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #303BB0

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

Preview Lab → · Contrast checker → · Palette generator →