#304FBC#304FBC

#304FBC is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.2% C 0.175 H 267.2°. Best body text is #FFFFFF at 7.07:1 contrast (WCAG AA passes).

Color values

HEX	#304FBC
RGB	rgb(48, 79, 188)
HSL	hsl(227, 59%, 46%)
HSV	hsv(227, 74%, 74%)
CMYK	cmyk(74.5%, 58%, 0%, 26.3%)
CIE-LAB	lab(37.57, 27.29, -60.67)
CIE-LCH	lch(37.57, 66.52, 294.22°)
OKLab	oklab(47.21% -0.0086 -0.1751)
OKLCH	oklch(47.21% 0.175 267.2)
XYZ	xyz(13.0888, 9.8498, 48.7786)
Luminance	0.0985 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FBC #BC9D30

analogous

#3095BC #304FBC #5730BC

triadic

#304FBC #BC304F #4FBC30

tetradic

#304FBC #BC3095 #BC9D30 #30BC57

square

#304FBC #BC3095 #BC9D30 #30BC57

split-complementary

#304FBC #BC5730 #95BC30

monochromatic

#17265A #243B8B #304FBC #5571D4 #869AE0

Accessibility & contrast

On white

7.07

#304FBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#304FBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FBC

7.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FBC	#FFFFFF	#000000	##FFFFFF
##304FBC	1.00	7.07	2.97	7.07
#FFFFFF	7.07	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FC0

Deuteranopia (green-blind)

#0052BA

Tritanopia (blue-blind)

#006A7E

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #304fbc;
/* rgb */ color: rgb(48, 79, 188);
/* oklch */ color: oklch(47.2% 0.175 267.2);

Tailwind

colors: {
  custom: {
    50: '#7c7fd1',
    500: '#304fbc',
    950: '#000000',
  },
}

SCSS

$custom: #304fbc;
$custom-light: #7c7fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#304fbc",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 188
  },
  "hsl": {
    "h": 226.714,
    "s": 59.322,
    "l": 46.275
  },
  "oklch": {
    "l": 0.47207,
    "c": 0.17528,
    "h": 267.2
  },
  "luminance": 0.09851
}

Semantic roles & 50–950 ramp

primary

#304FBC

secondary

#CAB97E

accent

#C045E3

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304FBC

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

Preview Lab → · Contrast checker → · Palette generator →