#303CB0#303CB0

#303CB0 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.6% C 0.182 H 271.5°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#303CB0
RGB	rgb(48, 60, 176)
HSL	hsl(234, 57%, 44%)
HSV	hsv(234, 73%, 69%)
CMYK	cmyk(72.7%, 65.9%, 0%, 31%)
CIE-LAB	lab(31.79, 35.19, -63.02)
CIE-LCH	lch(31.79, 72.18, 299.18°)
OKLab	oklab(42.62% 0.0047 -0.1821)
OKLCH	oklch(42.62% 0.182 271.5)
XYZ	xyz(10.6686, 6.9936, 41.8535)
Luminance	0.0699 (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

#303CB0 #B0A430

analogous

#307CB0 #303CB0 #6430B0

triadic

#303CB0 #B0303C #3CB030

tetradic

#303CB0 #B0307C #B0A430 #30B064

square

#303CB0 #B0307C #B0A430 #30B064

split-complementary

#303CB0 #B06430 #7CB030

monochromatic

#161B50 #232C80 #303CB0 #4E5ACF #7E87DC

Accessibility & contrast

On white

8.75

#303CB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#303CB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB0

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB0	#FFFFFF	#000000	##FFFFFF
##303CB0	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303cb0;
/* rgb */ color: rgb(48, 60, 176);
/* oklch */ color: oklch(42.6% 0.182 271.5);

Tailwind

colors: {
  custom: {
    50: '#7b72c9',
    500: '#303cb0',
    950: '#000000',
  },
}

SCSS

$custom: #303cb0;
$custom-light: #7b72c9;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb0",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 176
  },
  "hsl": {
    "h": 234.375,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.4262,
    "c": 0.18221,
    "h": 271.5
  },
  "luminance": 0.06995
}

Semantic roles & 50–950 ramp

primary

#303CB0

secondary

#C5BD77

accent

#D247E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303CB0

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

Preview Lab → · Contrast checker → · Palette generator →