#306CD3#306CD3

#306CD3 is a mid, vivid blue. Relative luminance 0.161; OKLCH L 54.9% C 0.171 H 260.5°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#306CD3
RGB	rgb(48, 108, 211)
HSL	hsl(218, 65%, 51%)
HSV	hsv(218, 77%, 83%)
CMYK	cmyk(77.3%, 48.8%, 0%, 17.3%)
CIE-LAB	lab(47.05, 17.15, -58.61)
CIE-LCH	lch(47.05, 61.07, 286.31°)
OKLab	oklab(54.91% -0.0283 -0.1685)
OKLCH	oklch(54.91% 0.171 260.5)
XYZ	xyz(18.3351, 16.0545, 63.7479)
Luminance	0.1606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#306CD3 #D39730

analogous

#30BDD3 #306CD3 #4530D3

triadic

#306CD3 #D3306C #6CD330

tetradic

#306CD3 #D330BD #D39730 #30D345

square

#306CD3 #D330BD #D39730 #30D345

split-complementary

#306CD3 #D34530 #BDD330

monochromatic

#183971 #2352A3 #306CD3 #6290DE #95B4E8

Accessibility & contrast

On white

4.99

#306CD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#306CD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #306CD3

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##306CD3	#FFFFFF	#000000	##FFFFFF
##306CD3	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F77D7

Deuteranopia (green-blind)

#0069D1

Tritanopia (blue-blind)

#008595

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #306cd3;
/* rgb */ color: rgb(48, 108, 211);
/* oklch */ color: oklch(54.9% 0.171 260.5);

Tailwind

colors: {
  custom: {
    50: '#8095e1',
    500: '#306cd3',
    950: '#000000',
  },
}

SCSS

$custom: #306cd3;
$custom-light: #8095e1;
$custom-dark: #000000;

JSON

{
  "hex": "#306cd3",
  "rgb": {
    "r": 48,
    "g": 108,
    "b": 211
  },
  "hsl": {
    "h": 217.914,
    "s": 64.94,
    "l": 50.784
  },
  "oklch": {
    "l": 0.54909,
    "c": 0.17088,
    "h": 260.5
  },
  "luminance": 0.16057
}

Semantic roles & 50–950 ramp

primary

#306CD3

secondary

#D4B98B

accent

#AA40E8

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #306CD3

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

Preview Lab → · Contrast checker → · Palette generator →