#304AB5#304AB5

#304AB5 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.172 H 268.3°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#304AB5
RGB	rgb(48, 74, 181)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 73%, 71%)
CMYK	cmyk(73.5%, 59.1%, 0%, 29%)
CIE-LAB	lab(35.72, 27.96, -59.57)
CIE-LCH	lch(35.72, 65.81, 295.14°)
OKLab	oklab(45.65% -0.0052 -0.1719)
OKLCH	oklch(45.65% 0.172 268.3)
XYZ	xyz(12.0053, 8.8609, 44.7847)
Luminance	0.0886 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB5 #B59B30

analogous

#308CB5 #304AB5 #5930B5

triadic

#304AB5 #B5304A #4AB530

tetradic

#304AB5 #B5308C #B59B30 #30B559

square

#304AB5 #B5308C #B59B30 #30B559

split-complementary

#304AB5 #B55930 #8CB530

monochromatic

#162254 #233685 #304AB5 #516AD1 #8294DE

Accessibility & contrast

On white

7.57

#304AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#304AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB5

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB5	#FFFFFF	#000000	##FFFFFF
##304AB5	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB9

Deuteranopia (green-blind)

#004EB3

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ab5;
/* rgb */ color: rgb(48, 74, 181);
/* oklch */ color: oklch(45.6% 0.172 268.3);

Tailwind

colors: {
  custom: {
    50: '#7b7ccc',
    500: '#304ab5',
    950: '#000000',
  },
}

SCSS

$custom: #304ab5;
$custom-light: #7b7ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab5",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 181
  },
  "hsl": {
    "h": 228.271,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.45648,
    "c": 0.172,
    "h": 268.3
  },
  "luminance": 0.08862
}

Semantic roles & 50–950 ramp

primary

#304AB5

secondary

#C7B87A

accent

#C346E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304AB5

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

Preview Lab → · Contrast checker → · Palette generator →