#303DAB#303DAB

#303DAB is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.174 H 271.4°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#303DAB
RGB	rgb(48, 61, 171)
HSL	hsl(234, 56%, 43%)
HSV	hsv(234, 72%, 67%)
CMYK	cmyk(71.9%, 64.3%, 0%, 32.9%)
CIE-LAB	lab(31.59, 32.76, -60.36)
CIE-LCH	lch(31.59, 68.68, 298.49°)
OKLab	oklab(42.34% 0.0044 -0.1744)
OKLCH	oklch(42.34% 0.174 271.4)
XYZ	xyz(10.2359, 6.9051, 39.3136)
Luminance	0.0691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.35

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DAB #AB9E30

analogous

#307AAB #303DAB #6130AB

triadic

#303DAB #AB303D #3DAB30

tetradic

#303DAB #AB307A #AB9E30 #30AB61

square

#303DAB #AB307A #AB9E30 #30AB61

split-complementary

#303DAB #AB6130 #7AAB30

monochromatic

#151B4B #232C7B #303DAB #4C59CD #7B85DA

Accessibility & contrast

On white

8.82

#303DAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#303DAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DAB

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

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

#0050AF

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303dab;
/* rgb */ color: rgb(48, 61, 171);
/* oklch */ color: oklch(42.3% 0.174 271.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#303dab",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 171
  },
  "hsl": {
    "h": 233.659,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42336,
    "c": 0.17442,
    "h": 271.4
  },
  "luminance": 0.06906
}

Semantic roles & 50–950 ramp

primary

#303DAB

secondary

#C3BA74

accent

#CF48DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303DAB

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

Preview Lab → · Contrast checker → · Palette generator →