#304AB8#304AB8

#304AB8 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.9% C 0.176 H 268.3°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#304AB8
RGB	rgb(48, 74, 184)
HSL	hsl(229, 59%, 45%)
HSV	hsv(229, 74%, 72%)
CMYK	cmyk(73.9%, 59.8%, 0%, 27.8%)
CIE-LAB	lab(35.96, 29.07, -60.95)
CIE-LCH	lch(35.96, 67.53, 295.50°)
OKLab	oklab(45.9% -0.0051 -0.176)
OKLCH	oklch(45.9% 0.176 268.3)
XYZ	xyz(12.3164, 8.9853, 46.4233)
Luminance	0.0899 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB8 #B89E30

analogous

#308EB8 #304AB8 #5A30B8

triadic

#304AB8 #B8304A #4AB830

tetradic

#304AB8 #B8308E #B89E30 #30B85A

square

#304AB8 #B8308E #B89E30 #30B85A

split-complementary

#304AB8 #B85A30 #8EB830

monochromatic

#172357 #233687 #304AB8 #536BD2 #8495DF

Accessibility & contrast

On white

7.51

#304AB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#304AB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB8

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB8	#FFFFFF	#000000	##FFFFFF
##304AB8	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBC

Deuteranopia (green-blind)

#004EB6

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304ab8;
/* rgb */ color: rgb(48, 74, 184);
/* oklch */ color: oklch(45.9% 0.176 268.3);

Tailwind

colors: {
  custom: {
    50: '#7c7cce',
    500: '#304ab8',
    950: '#000000',
  },
}

SCSS

$custom: #304ab8;
$custom-light: #7c7cce;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab8",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 184
  },
  "hsl": {
    "h": 228.529,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.45902,
    "c": 0.17603,
    "h": 268.3
  },
  "luminance": 0.08987
}

Semantic roles & 50–950 ramp

primary

#304AB8

secondary

#C8B97C

accent

#C446E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304AB8

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

Preview Lab → · Contrast checker → · Palette generator →