#304DBB#304DBB

#304DBB is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.7% C 0.176 H 267.7°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#304DBB
RGB	rgb(48, 77, 187)
HSL	hsl(227, 59%, 46%)
HSV	hsv(227, 74%, 73%)
CMYK	cmyk(74.3%, 58.8%, 0%, 26.7%)
CIE-LAB	lab(36.97, 28.22, -61.06)
CIE-LCH	lch(36.97, 67.27, 294.81°)
OKLab	oklab(46.73% -0.0072 -0.1762)
OKLCH	oklch(46.73% 0.176 267.7)
XYZ	xyz(12.8393, 9.5226, 48.1655)
Luminance	0.0952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304DBB #BB9E30

analogous

#3092BB #304DBB #5830BB

triadic

#304DBB #BB304D #4DBB30

tetradic

#304DBB #BB3092 #BB9E30 #30BB58

square

#304DBB #BB3092 #BB9E30 #30BB58

split-complementary

#304DBB #BB5830 #92BB30

monochromatic

#17255A #23398A #304DBB #556FD3 #8698E0

Accessibility & contrast

On white

7.23

#304DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#304DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304DBB

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304DBB	#FFFFFF	#000000	##FFFFFF
##304DBB	1.00	7.23	2.90	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBF

Deuteranopia (green-blind)

#0051B9

Tritanopia (blue-blind)

#00697C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304dbb;
/* rgb */ color: rgb(48, 77, 187);
/* oklch */ color: oklch(46.7% 0.176 267.7);

Tailwind

colors: {
  custom: {
    50: '#7c7ed0',
    500: '#304dbb',
    950: '#000000',
  },
}

SCSS

$custom: #304dbb;
$custom-light: #7c7ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#304dbb",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 187
  },
  "hsl": {
    "h": 227.482,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.46734,
    "c": 0.17639,
    "h": 267.7
  },
  "luminance": 0.09524
}

Semantic roles & 50–950 ramp

primary

#304DBB

secondary

#C9BA7D

accent

#C245E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304DBB

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

Preview Lab → · Contrast checker → · Palette generator →