#303FAA#303FAA

#303FAA is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.171 H 271.0°. Best body text is #FFFFFF at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#303FAA
RGB	rgb(48, 63, 170)
HSL	hsl(233, 56%, 43%)
HSV	hsv(233, 72%, 67%)
CMYK	cmyk(71.8%, 62.9%, 0%, 33.3%)
CIE-LAB	lab(32.00, 31.10, -59.10)
CIE-LCH	lch(32.00, 66.78, 297.76°)
OKLab	oklab(42.61% 0.003 -0.1706)
OKLCH	oklch(42.61% 0.171 271)
XYZ	xyz(10.2497, 7.0846, 38.8497)
Luminance	0.0709 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FAA #AA9B30

analogous

#307CAA #303FAA #5E30AA

triadic

#303FAA #AA303F #3FAA30

tetradic

#303FAA #AA307C #AA9B30 #30AA5E

square

#303FAA #AA307C #AA9B30 #30AA5E

split-complementary

#303FAA #AA5E30 #7CAA30

monochromatic

#151C4B #232D7A #303FAA #4B5BCC #7B86DA

Accessibility & contrast

On white

8.69

#303FAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#303FAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FAA

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FAA	#FFFFFF	#000000	##FFFFFF
##303FAA	1.00	8.69	2.42	8.69
#FFFFFF	8.69	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AD

Deuteranopia (green-blind)

#0046A8

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303faa;
/* rgb */ color: rgb(48, 63, 170);
/* oklch */ color: oklch(42.6% 0.171 271.0);

Tailwind

colors: {
  custom: {
    50: '#7974c4',
    500: '#303faa',
    950: '#000000',
  },
}

SCSS

$custom: #303faa;
$custom-light: #7974c4;
$custom-dark: #000000;

JSON

{
  "hex": "#303faa",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 170
  },
  "hsl": {
    "h": 232.623,
    "s": 55.963,
    "l": 42.745
  },
  "oklch": {
    "l": 0.4261,
    "c": 0.17067,
    "h": 271
  },
  "luminance": 0.07086
}

Semantic roles & 50–950 ramp

primary

#303FAA

secondary

#C2B874

accent

#CD49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303FAA

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

Preview Lab → · Contrast checker → · Palette generator →