Summary

Topic 1 How to use different text formats in web pages

HTML has 6 levels, h1 is the largest and h6 is the smallest. To insert a paragraph, use the letter p. If you want to make it bold, use the letter b. If you want italics, use the letter i. Use sup for superscript and sub for subscript. In HTML, using multiple spaces and line breaks will not produce more white space. Using br in a paragraph can achieve the effect of line breaks.

Topic 2 How to use different colors in web pages

RGB, hex codes or color names can be used. Of course, you can also use the color picker to select a color. The background color is generated after entering "background color" in CSS. If no color is entered, the background will be transparent. The opacity of the color can be set by entering rgba or "opacity".

Topic 3 Learn colors

Color is divided into hue, saturation and lightness. Make sure there is enough contrast when choosing foreground and background colors. In the hsla code, h represents hue, s represents saturation, l represents lightness, and a represents transparency. Color not only brings web pages to life but also conveys emotional arousal.