#303FA3#303FA3

#303FA3 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.0% C 0.161 H 271.1°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#303FA3
RGB	rgb(48, 63, 163)
HSL	hsl(232, 55%, 41%)
HSV	hsv(232, 71%, 64%)
CMYK	cmyk(70.6%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(31.41, 28.54, -55.85)
CIE-LCH	lch(31.41, 62.72, 297.07°)
OKLab	oklab(41.99% 0.0032 -0.1611)
OKLCH	oklch(41.99% 0.161 271.1)
XYZ	xyz(9.6050, 6.8268, 35.4547)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FA3 #A39430

analogous

#3079A3 #303FA3 #5B30A3

triadic

#303FA3 #A3303F #3FA330

tetradic

#303FA3 #A33079 #A39430 #30A35B

square

#303FA3 #A33079 #A39430 #30A35B

split-complementary

#303FA3 #A35B30 #79A330

monochromatic

#141A44 #222D74 #303FA3 #4758C9 #7783D7

Accessibility & contrast

On white

8.88

#303FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#303FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FA3

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FA3	#FFFFFF	#000000	##FFFFFF
##303FA3	1.00	8.88	2.37	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0045A1

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303fa3;
/* rgb */ color: rgb(48, 63, 163);
/* oklch */ color: oklch(42.0% 0.161 271.1);

Tailwind

colors: {
  custom: {
    50: '#7874bf',
    500: '#303fa3',
    950: '#000000',
  },
}

SCSS

$custom: #303fa3;
$custom-light: #7874bf;
$custom-dark: #000000;

JSON

{
  "hex": "#303fa3",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 232.174,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41991,
    "c": 0.16116,
    "h": 271.1
  },
  "luminance": 0.06828
}

Semantic roles & 50–950 ramp

primary

#303FA3

secondary

#BFB570

accent

#CB4ADE

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303FA3

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

Preview Lab → · Contrast checker → · Palette generator →