Transparent may refer to any of the following:
1. With hardware, transparent is a device that does nothing with data that passes through it. With software, a transparent program is a program that works so efficiently the user is unaffected or unaware that it is even working.
2. In reference to an image or graphic, transparent refers to an image that is clear and can take the effect of any images behind it. Below is an example of an image with a transparent background; as you can see, each of the images are the same images but can be used with different backgrounds.
Almost all image editors used today are capable of making an image a transparent image. If you're having trouble making an image transparent make sure it's saved as a GIF format first. If you want to remove an image's transparency you need to flatten the image, often this can be accomplished by saving the image as a different format such as JPG or JPEG. Additional help with creating transparent images is found in the document mentioned below.
3. When referring to color, transparent color is a color that lacks color or a color that is the same color as the background. For example, this text "example text" is red text with a red background, dragging the mouse and highlighting the red box shows the text. The text is transparent since it is the same color as the background.
There is no HTML transparent color code. If you wanted to have text with a transparent background, you would need to create a transparent image with the text in the image.