#303EB5#303EB5

#303EB5 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.186 H 270.9°. Best body text is #FFFFFF at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#303EB5
RGB	rgb(48, 62, 181)
HSL	hsl(234, 58%, 45%)
HSV	hsv(234, 73%, 71%)
CMYK	cmyk(73.5%, 65.7%, 0%, 29%)
CIE-LAB	lab(32.72, 35.71, -64.47)
CIE-LCH	lch(32.72, 73.70, 298.98°)
OKLab	oklab(43.44% 0.0031 -0.1864)
OKLCH	oklch(43.44% 0.186 270.9)
XYZ	xyz(11.2792, 7.4087, 44.5427)
Luminance	0.0741 (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

#303EB5 #B5A730

analogous

#3081B5 #303EB5 #6430B5

triadic

#303EB5 #B5303E #3EB530

tetradic

#303EB5 #B53081 #B5A730 #30B564

square

#303EB5 #B53081 #B5A730 #30B564

split-complementary

#303EB5 #B56430 #81B530

monochromatic

#161D54 #232D85 #303EB5 #515FD1 #828BDE

Accessibility & contrast

On white

8.46

#303EB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#303EB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EB5

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EB5	#FFFFFF	#000000	##FFFFFF
##303EB5	1.00	8.46	2.48	8.46
#FFFFFF	8.46	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303eb5;
/* rgb */ color: rgb(48, 62, 181);
/* oklch */ color: oklch(43.4% 0.186 270.9);

Tailwind

colors: {
  custom: {
    50: '#7c73cc',
    500: '#303eb5',
    950: '#000000',
  },
}

SCSS

$custom: #303eb5;
$custom-light: #7c73cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303eb5",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 181
  },
  "hsl": {
    "h": 233.684,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43436,
    "c": 0.18642,
    "h": 270.9
  },
  "luminance": 0.0741
}

Semantic roles & 50–950 ramp

primary

#303EB5

secondary

#C7BF7A

accent

#D146E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303EB5

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

Preview Lab → · Contrast checker → · Palette generator →