#303BAB#303BAB

#303BAB is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.177 H 271.9°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#303BAB
RGB	rgb(48, 59, 171)
HSL	hsl(235, 56%, 43%)
HSV	hsv(235, 72%, 67%)
CMYK	cmyk(71.9%, 65.5%, 0%, 32.9%)
CIE-LAB	lab(31.10, 34.04, -61.16)
CIE-LCH	lch(31.10, 69.99, 299.10°)
OKLab	oklab(41.98% 0.0057 -0.1767)
OKLCH	oklch(41.98% 0.177 271.9)
XYZ	xyz(10.1311, 6.6956, 39.2786)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.22

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303BAB #ABA030

analogous

#3078AB #303BAB #6230AB

triadic

#303BAB #AB303B #3BAB30

tetradic

#303BAB #AB3078 #ABA030 #30AB62

square

#303BAB #AB3078 #ABA030 #30AB62

split-complementary

#303BAB #AB6230 #78AB30

monochromatic

#151A4B #232B7B #303BAB #4C57CD #7B84DA

Accessibility & contrast

On white

8.98

#303BAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#303BAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BAB

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BAB	#FFFFFF	#000000	##FFFFFF
##303BAB	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAF

Deuteranopia (green-blind)

#0044A9

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #303bab;
/* rgb */ color: rgb(48, 59, 171);
/* oklch */ color: oklch(42.0% 0.177 271.9);

Tailwind

colors: {
  custom: {
    50: '#7a71c5',
    500: '#303bab',
    950: '#000000',
  },
}

SCSS

$custom: #303bab;
$custom-light: #7a71c5;
$custom-dark: #000000;

JSON

{
  "hex": "#303bab",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 171
  },
  "hsl": {
    "h": 234.634,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41979,
    "c": 0.17681,
    "h": 271.9
  },
  "luminance": 0.06697
}

Semantic roles & 50–950 ramp

primary

#303BAB

secondary

#C3BC74

accent

#D248DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #303BAB

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

Preview Lab → · Contrast checker → · Palette generator →