ANSI formatted text cannot have both a background and foreground colour #38

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2025-09-07T09:39:30Z

mcplayer3 commented

2025-09-07 09:39:30 +00:00

(Migrated from github.com)

Let's say I had a script that ran print("\x1b[46;34mText"), you would assume that it would print blue text with a cyan background colour. Instead, I get white text (the text colour of the terminal) on a cyan background.

If I were to instead flip the order of the arguments and run print("\x1b[34;46mText"), the reverse problem happens where the text is blue but the background colour is black (the terminal background).

This problem applies to all types of ANSI formatting (3/4-bit, 8-bit, 24-bit).

Let's say I had a script that ran `print("\x1b[46;34mText")`, you would assume that it would print blue text with a cyan background colour. Instead, I get white text (the text colour of the terminal) on a cyan background. If I were to instead flip the order of the arguments and run `print("\x1b[34;46mText")`, the reverse problem happens where the text is blue but the background colour is black (the terminal background). This problem applies to all types of ANSI formatting (3/4-bit, 8-bit, 24-bit). <img width="236" height="191" alt="Image" src="https://github.com/user-attachments/assets/4b7fee85-7261-4b25-a6a7-688385be2858" />

WahPlus commented

2025-09-18 08:59:20 +00:00

(Migrated from github.com)

Makes sense. I think the ANSI engine is made to only process one thing at a time.

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Reference: Cerulean-Blue/Halyde#38