#303FB5#303FB5

#303FB5 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.185 H 270.7°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#303FB5
RGB	rgb(48, 63, 181)
HSL	hsl(233, 58%, 45%)
HSV	hsv(233, 73%, 71%)
CMYK	cmyk(73.5%, 65.2%, 0%, 29%)
CIE-LAB	lab(32.96, 35.07, -64.08)
CIE-LCH	lch(32.96, 73.05, 298.70°)
OKLab	oklab(43.61% 0.0024 -0.1852)
OKLCH	oklch(43.61% 0.185 270.7)
XYZ	xyz(11.3341, 7.5184, 44.5610)
Luminance	0.0752 (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

#303FB5 #B5A630

analogous

#3082B5 #303FB5 #6330B5

triadic

#303FB5 #B5303F #3FB530

tetradic

#303FB5 #B53082 #B5A630 #30B563

square

#303FB5 #B53082 #B5A630 #30B563

split-complementary

#303FB5 #B56330 #82B530

monochromatic

#161D54 #232E85 #303FB5 #5160D1 #828CDE

Accessibility & contrast

On white

8.39

#303FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#303FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FB5

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FB5	#FFFFFF	#000000	##FFFFFF
##303FB5	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #303fb5;
/* rgb */ color: rgb(48, 63, 181);
/* oklch */ color: oklch(43.6% 0.185 270.7);

Tailwind

colors: {
  custom: {
    50: '#7c74cc',
    500: '#303fb5',
    950: '#000000',
  },
}

SCSS

$custom: #303fb5;
$custom-light: #7c74cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303fb5",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 233.233,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43611,
    "c": 0.18525,
    "h": 270.7
  },
  "luminance": 0.0752
}

Semantic roles & 50–950 ramp

primary

#303FB5

secondary

#C7BE7A

accent

#D046E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303FB5

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

Preview Lab → · Contrast checker → · Palette generator →