Colors: Representing Color in Computers

Learning Objectives Explain the concept of a pixel and its role in displaying color. Describe the RGB color model and how it combines red, green, and blue light. Identify the numerical range (0-255) for each component in an RGB color. Convert simple RGB color values into their corresponding hexadecimal representations. Interpret hexadecimal color codes (e.g., #RRGGBB) to understand the color they represent. Apply RGB and hexadecimal color codes in a basic programming or web development context. Ever wonder how your computer screen, phone, or TV can show millions of different colors? 🌈 It's all thanks to a clever system for representing color digitally! In this lesson, we'll dive into how computers 'see' and create colors, exploring the fundamental model...

TermDefinitionExample PixelThe smallest individual unit of a digital image or display. Each pixel can display only one color at a time.When you zoom in very close on a digital photo, you start to see tiny squares; each square is a pixel. RGB Color ModelAn additive color model where Red, Green, and Blue light are combined in various intensities to produce a wide range of other colors.Your computer monitor uses the RGB model: tiny red, green, and blue lights turn on and off to create all the colors you see. Color DepthThe number of bits used to represent the color of a single pixel. More bits mean more possible colors.A color depth of 24 bits (8 bits for Red, 8 for Green, 8 for Blue) allows for over 16 million different colors per pixel. Hexadecimal Color CodeA 6-digit alphanumeric code (pr...

RGB Component Range Each Red, Green, or Blue component in the RGB model is represented by an integer value between 0 and 255 (inclusive). 0 means no intensity for that color component (e.g., no red light), while 255 means full intensity (e.g., brightest red light). This range allows for 256 different levels for each component. Hexadecimal Pair Mapping In a hexadecimal color code (#RRGGBB), each two-digit hexadecimal pair (RR, GG, BB) directly corresponds to the decimal intensity value (0-255) of its respective color component. To convert, you take each hex pair (e.g., FF) and convert it to its decimal equivalent (e.g., 255). This is how a 6-digit hex code translates into three 0-255 RGB values. Additive Color Mixing Principle Increasing the numerical value of an R, G,...