#303DB3#303DB3

#303DB3 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.185 H 271.2°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#303DB3
RGB	rgb(48, 61, 179)
HSL	hsl(234, 58%, 45%)
HSV	hsv(234, 73%, 70%)
CMYK	cmyk(73.2%, 65.9%, 0%, 29.8%)
CIE-LAB	lab(32.30, 35.63, -63.97)
CIE-LCH	lch(32.30, 73.22, 299.12°)
OKLab	oklab(43.08% 0.0038 -0.1849)
OKLCH	oklch(43.08% 0.185 271.2)
XYZ	xyz(11.0216, 7.2194, 43.4517)
Luminance	0.0722 (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

#303DB3 #B3A630

analogous

#307FB3 #303DB3 #6530B3

triadic

#303DB3 #B3303D #3DB330

tetradic

#303DB3 #B3307F #B3A630 #30B365

square

#303DB3 #B3307F #B3A630 #30B365

split-complementary

#303DB3 #B36530 #7FB330

monochromatic

#161C52 #232D83 #303DB3 #505DD0 #808ADD

Accessibility & contrast

On white

8.59

#303DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#303DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DB3

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DB3	#FFFFFF	#000000	##FFFFFF
##303DB3	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0046B1

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303db3;
/* rgb */ color: rgb(48, 61, 179);
/* oklch */ color: oklch(43.1% 0.185 271.2);

Tailwind

colors: {
  custom: {
    50: '#7c72cb',
    500: '#303db3',
    950: '#000000',
  },
}

SCSS

$custom: #303db3;
$custom-light: #7c72cb;
$custom-dark: #000000;

JSON

{
  "hex": "#303db3",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 179
  },
  "hsl": {
    "h": 234.046,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43075,
    "c": 0.18497,
    "h": 271.2
  },
  "luminance": 0.07221
}

Semantic roles & 50–950 ramp

primary

#303DB3

secondary

#C6BE79

accent

#D247E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303DB3

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

Preview Lab → · Contrast checker → · Palette generator →