Masks can also match the alpha transparency of the mask image. Define at least two colors (top to bottom) radial-gradient () Sets a radial gradient as the background image. You learned from our CSS Colors Chapter, that you can use RGB as a color value.In addition to RGB, you can use an RGB color value with an alpha channel (RGBA) - which specifies the opacity for a color.. An RGBA color value is specified with: rgba(red, green, blue, alpha).The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).

The mask will therefore overlay the child and all of its descendants, and at a minimum will knock out everything outside the border box of the object.

The source for this interactive example is … The first way is the use of the mask-image, mask-repeat, mask-position, mask-clip, mask-origin and mask-size properties that are specified similar to their counter part background with background-image. -webkit-background-clip: text; This is a non-standardized property, but it was invented to do just this. In this method, you can use a simple transparent image as a background image and a solid background color. Css遮罩是2008年4月由苹果公司添加到webkit引擎中的。遮罩提供一种基于像素级别的，可以控制元素透明度的能力，类似于png24位或png32位中的alpha透明通道的效果。值得庆幸的是2012年11月15号，遮罩第一次出现在w3c公布的草案中。但是跟苹果公司的是不同的版本。

The background of an element is the total size of the element, including padding and border (but not the margin). Here’s an example of a CSS3 background gradient pattern being revealed by a mask:

If you want to change the color of the .png masks, you can easily do it in Photoshop (or any other graphic tool) by applying a color overlay to the whole image layer. Like for background-image, it The background shorthand CSS property sets all background style properties at once, such as color, image, origin and size, or repeat method. Definition and Usage. This time we took advantage of the PNG transparencies to zoom through the mask layer, into a project background image. What I did above was create a dark class with filter: brightness(0.1).You can also do the opposite for darker icons. Then simply apply it as a mask image in CSS with only 2 lines of code! You need to have a value greater than 0 in any of the rgb channels. The mask property combines image masking with referencing a mask as follows.

Now if we want to get creative, we can put something more interesting in the parent element’s background, and image or a CSS gradient pattern.

Definition and Usage. The mask-image CSS property sets the image that is used as mask layer for an element. As you can see, the image mask reveals the black background color in the shape of the gradient image mask. The background-clip property defines how far the background (color or image) should extend within an element. Define at least two colors (center to edges) repeating-linear-gradient () Repeats a linear gradient.