#305CB3#305CB3

#305CB3 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.2% C 0.147 H 262.2°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#305CB3
RGB	rgb(48, 92, 179)
HSL	hsl(220, 58%, 45%)
HSV	hsv(220, 73%, 70%)
CMYK	cmyk(73.2%, 48.6%, 0%, 29.8%)
CIE-LAB	lab(40.47, 15.40, -50.69)
CIE-LCH	lch(40.47, 52.98, 286.90°)
OKLab	oklab(49.2% -0.0198 -0.1455)
OKLCH	oklch(49.2% 0.147 262.2)
XYZ	xyz(13.1798, 11.5359, 44.1711)
Luminance	0.1154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305CB3 #B38730

analogous

#309EB3 #305CB3 #4530B3

triadic

#305CB3 #B3305C #5CB330

tetradic

#305CB3 #B3309E #B38730 #30B345

square

#305CB3 #B3309E #B38730 #30B345

split-complementary

#305CB3 #B34530 #9EB330

monochromatic

#162A52 #234383 #305CB3 #507BD0 #809FDD

Accessibility & contrast

On white

6.35

#305CB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#305CB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305CB3

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305CB3	#FFFFFF	#000000	##FFFFFF
##305CB3	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C66B6

Deuteranopia (green-blind)

#015AB1

Tritanopia (blue-blind)

#00717F

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #305cb3;
/* rgb */ color: rgb(48, 92, 179);
/* oklch */ color: oklch(49.2% 0.147 262.2);

Tailwind

colors: {
  custom: {
    50: '#7a89ca',
    500: '#305cb3',
    950: '#000000',
  },
}

SCSS

$custom: #305cb3;
$custom-light: #7a89ca;
$custom-dark: #000000;

JSON

{
  "hex": "#305cb3",
  "rgb": {
    "r": 48,
    "g": 92,
    "b": 179
  },
  "hsl": {
    "h": 219.847,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.49196,
    "c": 0.14685,
    "h": 262.2
  },
  "luminance": 0.11537
}

Semantic roles & 50–950 ramp

primary

#305CB3

secondary

#C6AC79

accent

#AD47E1

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #305CB3

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

Preview Lab → · Contrast checker → · Palette generator →