#304CB0#304CB0

#304CB0 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.163 H 267.6°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#304CB0
RGB	rgb(48, 76, 176)
HSL	hsl(227, 57%, 44%)
HSV	hsv(227, 73%, 69%)
CMYK	cmyk(72.7%, 56.8%, 0%, 31%)
CIE-LAB	lab(35.85, 24.79, -56.39)
CIE-LCH	lch(35.85, 61.60, 293.73°)
OKLab	oklab(45.63% -0.0068 -0.1625)
OKLCH	oklch(45.63% 0.163 267.6)
XYZ	xyz(11.6371, 8.9306, 42.1764)
Luminance	0.0893 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB0 #B09430

analogous

#308CB0 #304CB0 #5430B0

triadic

#304CB0 #B0304C #4CB030

tetradic

#304CB0 #B0308C #B09430 #30B054

square

#304CB0 #B0308C #B09430 #30B054

split-complementary

#304CB0 #B05430 #8CB030

monochromatic

#162250 #233780 #304CB0 #4E6ACF #7E93DC

Accessibility & contrast

On white

7.54

#304CB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#304CB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB0

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB0	#FFFFFF	#000000	##FFFFFF
##304CB0	1.00	7.54	2.79	7.54
#FFFFFF	7.54	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB3

Deuteranopia (green-blind)

#004FAE

Tritanopia (blue-blind)

#006576

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304cb0;
/* rgb */ color: rgb(48, 76, 176);
/* oklch */ color: oklch(45.6% 0.163 267.6);

Tailwind

colors: {
  custom: {
    50: '#7a7dc8',
    500: '#304cb0',
    950: '#000000',
  },
}

SCSS

$custom: #304cb0;
$custom-light: #7a7dc8;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb0",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 176
  },
  "hsl": {
    "h": 226.875,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.45626,
    "c": 0.16269,
    "h": 267.6
  },
  "luminance": 0.08932
}

Semantic roles & 50–950 ramp

primary

#304CB0

secondary

#C5B477

accent

#BF47E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #304CB0

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

Preview Lab → · Contrast checker → · Palette generator →