#305CB8#305CB8

#305CB8 is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.6% C 0.154 H 262.8°. Best body text is #FFFFFF at 6.27:1 contrast (WCAG AA passes).

Color values

HEX	#305CB8
RGB	rgb(48, 92, 184)
HSL	hsl(221, 59%, 45%)
HSV	hsv(221, 74%, 72%)
CMYK	cmyk(73.9%, 50%, 0%, 27.8%)
CIE-LAB	lab(40.80, 17.28, -53.09)
CIE-LCH	lch(40.80, 55.83, 288.03°)
OKLab	oklab(49.56% -0.0191 -0.1526)
OKLCH	oklch(49.56% 0.154 262.8)
XYZ	xyz(13.6947, 11.7419, 46.8828)
Luminance	0.1174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305CB8 #B88C30

analogous

#30A0B8 #305CB8 #4830B8

triadic

#305CB8 #B8305C #5CB830

tetradic

#305CB8 #B830A0 #B88C30 #30B848

square

#305CB8 #B830A0 #B88C30 #30B848

split-complementary

#305CB8 #B84830 #A0B830

monochromatic

#172B57 #234487 #305CB8 #537CD2 #84A1DF

Accessibility & contrast

On white

6.27

#305CB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#305CB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305CB8

6.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305CB8	#FFFFFF	#000000	##FFFFFF
##305CB8	1.00	6.27	3.35	6.27
#FFFFFF	6.27	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2667BB

Deuteranopia (green-blind)

#005AB6

Tritanopia (blue-blind)

#007281

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #305cb8;
/* rgb */ color: rgb(48, 92, 184);
/* oklch */ color: oklch(49.6% 0.154 262.8);

Tailwind

colors: {
  custom: {
    50: '#7b89ce',
    500: '#305cb8',
    950: '#000000',
  },
}

SCSS

$custom: #305cb8;
$custom-light: #7b89ce;
$custom-dark: #000000;

JSON

{
  "hex": "#305cb8",
  "rgb": {
    "r": 48,
    "g": 92,
    "b": 184
  },
  "hsl": {
    "h": 220.588,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.49558,
    "c": 0.15376,
    "h": 262.8
  },
  "luminance": 0.11743
}

Semantic roles & 50–950 ramp

primary

#305CB8

secondary

#C8AF7C

accent

#AF46E2

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #305CB8

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

Preview Lab → · Contrast checker → · Palette generator →