#305BB9#305BB9

#305BB9 is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.4% C 0.156 H 263.3°. Best body text is #FFFFFF at 6.32:1 contrast (WCAG AA passes).

Color values

HEX	#305BB9
RGB	rgb(48, 91, 185)
HSL	hsl(221, 59%, 46%)
HSV	hsv(221, 74%, 73%)
CMYK	cmyk(74.1%, 50.8%, 0%, 27.5%)
CIE-LAB	lab(40.59, 18.31, -54.01)
CIE-LCH	lch(40.59, 57.03, 288.73°)
OKLab	oklab(49.42% -0.0182 -0.1553)
OKLCH	oklch(49.42% 0.156 263.3)
XYZ	xyz(13.7139, 11.6118, 47.4081)
Luminance	0.1161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BB9 #B98E30

analogous

#309FB9 #305BB9 #4A30B9

triadic

#305BB9 #B9305B #5BB930

tetradic

#305BB9 #B9309F #B98E30 #30B94A

square

#305BB9 #B9309F #B98E30 #30B94A

split-complementary

#305BB9 #B94A30 #9FB930

monochromatic

#172B58 #234388 #305BB9 #547BD3 #84A1DF

Accessibility & contrast

On white

6.32

#305BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#305BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BB9

6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BB9	#FFFFFF	#000000	##FFFFFF
##305BB9	1.00	6.32	3.32	6.32
#FFFFFF	6.32	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2166BC

Deuteranopia (green-blind)

#005AB7

Tritanopia (blue-blind)

#007181

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #305bb9;
/* rgb */ color: rgb(48, 91, 185);
/* oklch */ color: oklch(49.4% 0.156 263.3);

Tailwind

colors: {
  custom: {
    50: '#7b88cf',
    500: '#305bb9',
    950: '#000000',
  },
}

SCSS

$custom: #305bb9;
$custom-light: #7b88cf;
$custom-dark: #000000;

JSON

{
  "hex": "#305bb9",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 185
  },
  "hsl": {
    "h": 221.168,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.4942,
    "c": 0.15636,
    "h": 263.3
  },
  "luminance": 0.11613
}

Semantic roles & 50–950 ramp

primary

#305BB9

secondary

#C9B17C

accent

#B146E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #305BB9

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

Preview Lab → · Contrast checker → · Palette generator →