#305BB8#305BB8

#305BB8 is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.3% C 0.155 H 263.2°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#305BB8
RGB	rgb(48, 91, 184)
HSL	hsl(221, 59%, 45%)
HSV	hsv(221, 74%, 72%)
CMYK	cmyk(73.9%, 50.5%, 0%, 27.8%)
CIE-LAB	lab(40.52, 17.94, -53.54)
CIE-LCH	lch(40.52, 56.46, 288.52°)
OKLab	oklab(49.35% -0.0183 -0.1539)
OKLCH	oklch(49.35% 0.155 263.2)
XYZ	xyz(13.6087, 11.5698, 46.8541)
Luminance	0.1157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BB8 #B88D30

analogous

#309FB8 #305BB8 #4930B8

triadic

#305BB8 #B8305B #5BB830

tetradic

#305BB8 #B8309F #B88D30 #30B849

square

#305BB8 #B8309F #B88D30 #30B849

split-complementary

#305BB8 #B84930 #9FB830

monochromatic

#172B57 #234387 #305BB8 #537BD2 #84A0DF

Accessibility & contrast

On white

6.34

#305BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#305BB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BB8

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BB8	#FFFFFF	#000000	##FFFFFF
##305BB8	1.00	6.34	3.31	6.34
#FFFFFF	6.34	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2366BB

Deuteranopia (green-blind)

#005AB6

Tritanopia (blue-blind)

#007181

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #305bb8;
/* rgb */ color: rgb(48, 91, 184);
/* oklch */ color: oklch(49.3% 0.155 263.2);

Tailwind

colors: {
  custom: {
    50: '#7b88ce',
    500: '#305bb8',
    950: '#000000',
  },
}

SCSS

$custom: #305bb8;
$custom-light: #7b88ce;
$custom-dark: #000000;

JSON

{
  "hex": "#305bb8",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 184
  },
  "hsl": {
    "h": 221.029,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.49346,
    "c": 0.15499,
    "h": 263.2
  },
  "luminance": 0.11571
}

Semantic roles & 50–950 ramp

primary

#305BB8

secondary

#C8B07C

accent

#B146E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #305BB8

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

Preview Lab → · Contrast checker → · Palette generator →