#304AB3#304AB3

#304AB3 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.5% C 0.169 H 268.2°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#304AB3
RGB	rgb(48, 74, 179)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 73%, 70%)
CMYK	cmyk(73.2%, 58.7%, 0%, 29.8%)
CIE-LAB	lab(35.56, 27.22, -58.65)
CIE-LCH	lch(35.56, 64.66, 294.90°)
OKLab	oklab(45.48% -0.0052 -0.1692)
OKLCH	oklch(45.48% 0.169 268.2)
XYZ	xyz(11.8016, 8.7794, 43.7117)
Luminance	0.0878 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB3 #B39930

analogous

#308BB3 #304AB3 #5830B3

triadic

#304AB3 #B3304A #4AB330

tetradic

#304AB3 #B3308B #B39930 #30B358

square

#304AB3 #B3308B #B39930 #30B358

split-complementary

#304AB3 #B35830 #8BB330

monochromatic

#162252 #233683 #304AB3 #506AD0 #8093DD

Accessibility & contrast

On white

7.62

#304AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#304AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB3

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB3	#FFFFFF	#000000	##FFFFFF
##304AB3	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB7

Deuteranopia (green-blind)

#004EB1

Tritanopia (blue-blind)

#006477

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ab3;
/* rgb */ color: rgb(48, 74, 179);
/* oklch */ color: oklch(45.5% 0.169 268.2);

Tailwind

colors: {
  custom: {
    50: '#7b7ccb',
    500: '#304ab3',
    950: '#000000',
  },
}

SCSS

$custom: #304ab3;
$custom-light: #7b7ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab3",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 179
  },
  "hsl": {
    "h": 228.092,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.45479,
    "c": 0.16929,
    "h": 268.2
  },
  "luminance": 0.08781
}

Semantic roles & 50–950 ramp

primary

#304AB3

secondary

#C6B779

accent

#C247E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304AB3

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

Preview Lab → · Contrast checker → · Palette generator →