**Definition:**
CSS (Cascading Style Sheets) is a language used to style the appearance of text, colors, and fonts on web pages. It allows designers to control how text looks and how colors are applied to enhance the visual appeal of a website.

**Key ideas:**
- CSS can change the font type, size, and style of text.
- Colors can be applied to text, backgrounds, and borders using various formats (like hex, RGB, or named colors).
- CSS allows for text alignment, spacing, and decoration (like underline or strikethrough).
- Using CSS improves readability and user experience on websites.

**Why this topic matters in this category:**
Understanding CSS text, color, and font is essential for creating visually appealing and user-friendly web designs.