#304CBC#304CBC

#304CBC is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.6% C 0.179 H 267.9°. Best body text is #FFFFFF at 7.28:1 contrast (WCAG AA passes).

Color values

HEX	#304CBC
RGB	rgb(48, 76, 188)
HSL	hsl(228, 59%, 46%)
HSV	hsv(228, 74%, 74%)
CMYK	cmyk(74.5%, 59.6%, 0%, 26.3%)
CIE-LAB	lab(36.79, 29.25, -61.94)
CIE-LCH	lch(36.79, 68.49, 295.28°)
OKLab	oklab(46.63% -0.0065 -0.1788)
OKLCH	oklch(46.63% 0.179 267.9)
XYZ	xyz(12.8773, 9.4267, 48.7081)
Luminance	0.0943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CBC #BCA030

analogous

#3092BC #304CBC #5A30BC

triadic

#304CBC #BC304C #4CBC30

tetradic

#304CBC #BC3092 #BCA030 #30BC5A

square

#304CBC #BC3092 #BCA030 #30BC5A

split-complementary

#304CBC #BC5A30 #92BC30

monochromatic

#17255A #24388B #304CBC #556FD4 #8698E0

Accessibility & contrast

On white

7.28

#304CBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#304CBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CBC

7.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CBC	#FFFFFF	#000000	##FFFFFF
##304CBC	1.00	7.28	2.89	7.28
#FFFFFF	7.28	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DC0

Deuteranopia (green-blind)

#0050BA

Tritanopia (blue-blind)

#00687C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304cbc;
/* rgb */ color: rgb(48, 76, 188);
/* oklch */ color: oklch(46.6% 0.179 267.9);

Tailwind

colors: {
  custom: {
    50: '#7c7dd1',
    500: '#304cbc',
    950: '#000000',
  },
}

SCSS

$custom: #304cbc;
$custom-light: #7c7dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#304cbc",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 188
  },
  "hsl": {
    "h": 228,
    "s": 59.322,
    "l": 46.275
  },
  "oklch": {
    "l": 0.46626,
    "c": 0.17895,
    "h": 267.9
  },
  "luminance": 0.09428
}

Semantic roles & 50–950 ramp

primary

#304CBC

secondary

#CABB7E

accent

#C345E3

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304CBC

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

Preview Lab → · Contrast checker → · Palette generator →