#303FA4#303FA4

#303FA4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.163 H 271.1°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#303FA4
RGB	rgb(48, 63, 164)
HSL	hsl(232, 55%, 42%)
HSV	hsv(232, 71%, 64%)
CMYK	cmyk(70.7%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(31.49, 28.91, -56.32)
CIE-LCH	lch(31.49, 63.31, 297.17°)
OKLab	oklab(42.08% 0.0031 -0.1625)
OKLCH	oklch(42.08% 0.163 271.1)
XYZ	xyz(9.6950, 6.8628, 35.9285)
Luminance	0.0686 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FA4 #A49530

analogous

#3079A4 #303FA4 #5B30A4

triadic

#303FA4 #A4303F #3FA430

tetradic

#303FA4 #A43079 #A49530 #30A45B

square

#303FA4 #A43079 #A49530 #30A45B

split-complementary

#303FA4 #A45B30 #79A430

monochromatic

#141B45 #222D75 #303FA4 #4859C9 #7784D7

Accessibility & contrast

On white

8.85

#303FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#303FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FA4

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FA4	#FFFFFF	#000000	##FFFFFF
##303FA4	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A7

Deuteranopia (green-blind)

#0045A2

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303fa4;
/* rgb */ color: rgb(48, 63, 164);
/* oklch */ color: oklch(42.1% 0.163 271.1);

Tailwind

colors: {
  custom: {
    50: '#7874c0',
    500: '#303fa4',
    950: '#000000',
  },
}

SCSS

$custom: #303fa4;
$custom-light: #7874c0;
$custom-dark: #000000;

JSON

{
  "hex": "#303fa4",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 232.241,
    "s": 54.717,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42078,
    "c": 0.16253,
    "h": 271.1
  },
  "luminance": 0.06864
}

Semantic roles & 50–950 ramp

primary

#303FA4

secondary

#BFB570

accent

#CB4ADE

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303FA4

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

Preview Lab → · Contrast checker → · Palette generator →