Final answer:
In ROBOTC, when a command is displayed in color, it signifies recognition of the term as an important keyword, aiding in code writing and error detection.
Step-by-step explanation:
When a command appears in color when typed in ROBOTC, it means that ROBOTC recognizes the command as an important keyword. Syntax highlighting is a feature in many programming environments that color codes language keywords, variables, and other elements, which helps programmers in reading and writing code. Keywords are predefined or reserved words in a programming language that have special meanings. These are the building blocks of the programming language's syntax. The color differentiation makes it easier for the programmer to distinguish keywords from other text, thus aiding in error detection and code organization.
In the case of ROBOTC, which is a C-based programming language used to program robots, this feature is particularly useful because it can help to quickly identify syntactical errors or confirm that you have used a legitimate ROBOTC command. Therefore, the correct answer to what it means when a command appears in color when typed in ROBOTC is that 'ROBOTC recognizes the command as an important keyword'.