#304FBB#304FBB

#304FBB is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.1% C 0.174 H 267.1°. Best body text is #FFFFFF at 7.09:1 contrast (WCAG AA passes).

Color values

HEX	#304FBB
RGB	rgb(48, 79, 187)
HSL	hsl(227, 59%, 46%)
HSV	hsv(227, 74%, 73%)
CMYK	cmyk(74.3%, 57.8%, 0%, 26.7%)
CIE-LAB	lab(37.49, 26.92, -60.21)
CIE-LCH	lch(37.49, 65.95, 294.09°)
OKLab	oklab(47.12% -0.0087 -0.1737)
OKLCH	oklch(47.12% 0.174 267.1)
XYZ	xyz(12.9814, 9.8068, 48.2128)
Luminance	0.0981 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FBB #BB9C30

analogous

#3094BB #304FBB #5630BB

triadic

#304FBB #BB304F #4FBB30

tetradic

#304FBB #BB3094 #BB9C30 #30BB56

square

#304FBB #BB3094 #BB9C30 #30BB56

split-complementary

#304FBB #BB5630 #94BB30

monochromatic

#17265A #233A8A #304FBB #5571D3 #869AE0

Accessibility & contrast

On white

7.09

#304FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#304FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FBB

7.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FBB	#FFFFFF	#000000	##FFFFFF
##304FBB	1.00	7.09	2.96	7.09
#FFFFFF	7.09	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBF

Deuteranopia (green-blind)

#0052B9

Tritanopia (blue-blind)

#006A7D

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #304fbb;
/* rgb */ color: rgb(48, 79, 187);
/* oklch */ color: oklch(47.1% 0.174 267.1);

Tailwind

colors: {
  custom: {
    50: '#7c7fd0',
    500: '#304fbb',
    950: '#000000',
  },
}

SCSS

$custom: #304fbb;
$custom-light: #7c7fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#304fbb",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 187
  },
  "hsl": {
    "h": 226.619,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.47124,
    "c": 0.17394,
    "h": 267.1
  },
  "luminance": 0.09808
}

Semantic roles & 50–950 ramp

primary

#304FBB

secondary

#C9B87D

accent

#BF45E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304FBB

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

Preview Lab → · Contrast checker → · Palette generator →