This deep dive covers Real-World Application: RGB Colors within Binary & Hex for GCSE Computer Science. Revise Binary & Hex in 3.3 Data Representation for GCSE Computer Science with 16 exam-style questions and 22 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Real-World Application: RGB Colors
Web Color Codes: #FF5733
This hex code defines a color using Red, Green, Blue values:
- FF = 255 red (maximum)
- 57 = 87 green (medium)
- 33 = 51 blue (low)
Result: A bright orange-red color. Each color channel is 0-255 (00-FF in hex), giving 16.7 million possible colors (256 × 256 × 256).
Why hex? "#FF5733" is much shorter and cleaner than "rgb(255, 87, 51)" and maps perfectly to binary (2 hex digits = 1 byte = one color channel).
Practice questions for Binary & Hex
Which of the following correctly describes the hexadecimal number system?
Explain why hexadecimal is used instead of binary when programmers write memory addresses and colour codes. Give three reasons.