#304CBF#304CBF

#304CBF is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.9% C 0.183 H 268.0°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#304CBF
RGB	rgb(48, 76, 191)
HSL	hsl(228, 60%, 47%)
HSV	hsv(228, 75%, 75%)
CMYK	cmyk(74.9%, 60.2%, 0%, 25.1%)
CIE-LAB	lab(37.04, 30.35, -63.30)
CIE-LCH	lch(37.04, 70.20, 295.62°)
OKLab	oklab(46.88% -0.0065 -0.1828)
OKLCH	oklch(46.88% 0.183 268)
XYZ	xyz(13.2041, 9.5574, 50.4290)
Luminance	0.0956 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CBF #BFA330

analogous

#3094BF #304CBF #5C30BF

triadic

#304CBF #BF304C #4CBF30

tetradic

#304CBF #BF3094 #BFA330 #30BF5C

square

#304CBF #BF3094 #BFA330 #30BF5C

split-complementary

#304CBF #BF5C30 #94BF30

monochromatic

#17255D #24398E #304CBF #5770D5 #889AE1

Accessibility & contrast

On white

7.21

#304CBF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#304CBF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CBF

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CBF	#FFFFFF	#000000	##FFFFFF
##304CBF	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EC3

Deuteranopia (green-blind)

#0051BD

Tritanopia (blue-blind)

#00697E

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304cbf;
/* rgb */ color: rgb(48, 76, 191);
/* oklch */ color: oklch(46.9% 0.183 268.0);

Tailwind

colors: {
  custom: {
    50: '#7d7dd3',
    500: '#304cbf',
    950: '#000000',
  },
}

SCSS

$custom: #304cbf;
$custom-light: #7d7dd3;
$custom-dark: #000000;

JSON

{
  "hex": "#304cbf",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 191
  },
  "hsl": {
    "h": 228.252,
    "s": 59.833,
    "l": 46.863
  },
  "oklch": {
    "l": 0.46883,
    "c": 0.18294,
    "h": 268
  },
  "luminance": 0.09559
}

Semantic roles & 50–950 ramp

primary

#304CBF

secondary

#CBBC80

accent

#C445E3

background

#F8F7FD

surface

#EFEEFA

border

#CAC9D3

text

#0B0914

muted

#7C7B83

Preview Lab

Preview with #304CBF

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

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