#303CAB#303CAB

#303CAB is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.2% C 0.176 H 271.6°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#303CAB
RGB	rgb(48, 60, 171)
HSL	hsl(234, 56%, 43%)
HSV	hsv(234, 72%, 67%)
CMYK	cmyk(71.9%, 64.9%, 0%, 32.9%)
CIE-LAB	lab(31.35, 33.40, -60.76)
CIE-LCH	lch(31.35, 69.34, 298.79°)
OKLab	oklab(42.16% 0.005 -0.1756)
OKLCH	oklch(42.16% 0.176 271.6)
XYZ	xyz(10.1830, 6.7994, 39.2959)
Luminance	0.0680 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.28

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303CAB #AB9F30

analogous

#307AAB #303CAB #6130AB

triadic

#303CAB #AB303C #3CAB30

tetradic

#303CAB #AB307A #AB9F30 #30AB61

square

#303CAB #AB307A #AB9F30 #30AB61

split-complementary

#303CAB #AB6130 #7AAB30

monochromatic

#151A4B #232B7B #303CAB #4C58CD #7B85DA

Accessibility & contrast

On white

8.90

#303CAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#303CAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CAB

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CAB	#FFFFFF	#000000	##FFFFFF
##303CAB	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AF

Deuteranopia (green-blind)

#0044A9

Tritanopia (blue-blind)

#00596E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303cab;
/* rgb */ color: rgb(48, 60, 171);
/* oklch */ color: oklch(42.2% 0.176 271.6);

Tailwind

colors: {
  custom: {
    50: '#7a72c5',
    500: '#303cab',
    950: '#000000',
  },
}

SCSS

$custom: #303cab;
$custom-light: #7a72c5;
$custom-dark: #000000;

JSON

{
  "hex": "#303cab",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 171
  },
  "hsl": {
    "h": 234.146,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42157,
    "c": 0.17562,
    "h": 271.6
  },
  "luminance": 0.068
}

Semantic roles & 50–950 ramp

primary

#303CAB

secondary

#C3BB74

accent

#D148DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303CAB

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

Preview Lab → · Contrast checker → · Palette generator →