#303AB3#303AB3

#303AB3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.188 H 271.7°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#303AB3
RGB	rgb(48, 58, 179)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 70%)
CMYK	cmyk(73.2%, 67.6%, 0%, 29.8%)
CIE-LAB	lab(31.60, 37.51, -65.13)
CIE-LCH	lch(31.60, 75.16, 299.94°)
OKLab	oklab(42.56% 0.0057 -0.1883)
OKLCH	oklch(42.56% 0.188 271.7)
XYZ	xyz(10.8659, 6.9080, 43.3998)
Luminance	0.0691 (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

#303AB3 #B3A930

analogous

#307CB3 #303AB3 #6830B3

triadic

#303AB3 #B3303A #3AB330

tetradic

#303AB3 #B3307C #B3A930 #30B368

square

#303AB3 #B3307C #B3A930 #30B368

split-complementary

#303AB3 #B36830 #7CB330

monochromatic

#161B52 #232A83 #303AB3 #505AD0 #8087DD

Accessibility & contrast

On white

8.82

#303AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#303AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303AB3

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303AB3	#FFFFFF	#000000	##FFFFFF
##303AB3	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)

#0051B7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303ab3;
/* rgb */ color: rgb(48, 58, 179);
/* oklch */ color: oklch(42.6% 0.188 271.7);

Tailwind

colors: {
  custom: {
    50: '#7c70cb',
    500: '#303ab3',
    950: '#000000',
  },
}

SCSS

$custom: #303ab3;
$custom-light: #7c70cb;
$custom-dark: #000000;

JSON

{
  "hex": "#303ab3",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 179
  },
  "hsl": {
    "h": 235.42,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42562,
    "c": 0.18841,
    "h": 271.7
  },
  "luminance": 0.06909
}

Semantic roles & 50–950 ramp

primary

#303AB3

secondary

#C6C079

accent

#D547E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #303AB3

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

Preview Lab → · Contrast checker → · Palette generator →