CSS filter drop-shadow All In One

CSS filter drop-shadow All In One

CSS 滤镜投影

drop-shadow

drop-shadow(offset-x offset-y blur-radius color)

1. px

/* Black shadow with 10px blur */
drop-shadow(16px 16px 10px black)

2. rem

/* Reddish shadow with 1rem blur */
drop-shadow(.5rem .5rem 1rem #e23)

https://developer.mozilla.org/en-US/docs/Web/CSS/filter-function/drop-shadow

filter

/* <filter-function> values */
filter: blur(5px);
filter: brightness(0.4);
filter: contrast(200%);
filter: drop-shadow(16px 16px 20px blue);
filter: grayscale(50%);
filter: hue-rotate(90deg);
filter: invert(75%);
filter: opacity(25%);
filter: saturate(30%);
filter: sepia(60%);

/* URL */
filter: url("filters.svg#filter-id");

/* Multiple filters */
filter: contrast(175%) brightness(3%);
filter: drop-shadow(3px 3px red) sepia(100%) drop-shadow(-3px -3px blue);

/* Use no filter */
filter: none;

/* Global values */
filter: inherit;
filter: initial;
filter: revert;
filter: revert-layer;
filter: unset;

https://developer.mozilla.org/en-US/docs/Web/CSS/filter

color

/* Keyword values */
color: currentcolor;

/* <named-color> values */
color: red;
color: orange;
color: tan;
color: rebeccapurple;

/* <hex-color> values */
color: #090;
color: #009900;
color: #090a;

/* rgba hex-color> values ✅ */
color: #009900aa;


/* <rgb()> values */
color: rgb(34, 12, 64, 0.6);
color: rgba(34, 12, 64, 0.6);
color: rgb(34 12 64 / 0.6);
color: rgba(34 12 64 / 0.3);
color: rgb(34 12 64 / 60%);
color: rgba(34.6 12 64 / 30%);

/* <hsl()> values */
color: hsl(30, 100%, 50%, 0.6);
color: hsla(30, 100%, 50%, 0.6);
color: hsl(30 100% 50% / 0.6);
color: hsla(30 100% 50% / 0.6);
color: hsl(30 100% 50% / 60%);
color: hsla(30.2 100% 50% / 60%);

/* <hwb()> values */
color: hwb(90 10% 10%);
color: hwb(90 10% 10% / 0.5);
color: hwb(90deg 10% 10%);
color: hwb(1.5708rad 60% 0%);
color: hwb(0.25turn 0% 40% / 50%);

/* Global values */
color: inherit;
color: initial;
color: revert;
color: revert-layer;
color: unset;

https://developer.mozilla.org/en-US/docs/Web/CSS/color

<color>

/* Named colors */
rebeccapurple
aliceblue

/* RGB Hexadecimal */
#f09
#ff0099

/* RGB (Red, Green, Blue) */
rgb(255 0 153)
rgb(255 0 153 / 80%)

/* HSL (Hue, Saturation, Lightness) */
hsl(150 30% 60%)
hsl(150 30% 60% / 0.8)

/* HWB (Hue, Whiteness, Blackness) */
hwb(12 50% 0%)
hwb(194 0% 0% / 0.5)

/* LAB (Lightness, A-axis, B-axis) */
lab(50% 40 59.5)
lab(50% 40 59.5 / 0.5)

/* LCH (Lightness, Chroma, Hue) */
lch(52.2% 72.2 50)
lch(52.2% 72.2 50 / 0.5)

/* Oklab (Lightness, A-axis, B-axis) */
oklab(59% 0.1 0.1)
oklab(59% 0.1 0.1 / 0.5)

/* Oklch (Lightness, Chroma, Hue) */
oklch(60% 0.15 50)
oklch(60% 0.15 50 / 0.5)

currentcolor

The currentcolor keyword represents the value of an element's color property.
This lets you use the color value on properties that do not receive it by default.

If currentcolor is used as the value of the color property, it instead takes its value from the inherited value of the color property.

<div style="color: blue; border: 1px dashed currentcolor;">
  The color of this text is blue.
  <div style="background: currentcolor; height:9px;"></div>
  This block is surrounded by a blue border.
</div>

https://developer.mozilla.org/en-US/docs/Web/CSS/color_value

https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/color-mix

demos

背景虚化 / 光晕特效

refs

https://css-tricks.com/almanac/properties/f/filter/

.my-element {
  filter: drop-shadow(0 0.2rem 0.25rem rgba(0, 0, 0, 0.2));
}

https://css-irl.info/drop-shadow-the-underrated-css-filter/

https://css-tricks.com/adding-shadows-to-svg-icons-with-css-and-svg-filters/

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