How to use colored logs in Rails for better visibility in the console

Colored Logs in Rails

Rails logger supports colored output in the console by using ANSI escape codes. This can help you quickly identify warnings, errors, or other important messages during development. Rails logger supports colored output in the console by using ANSI escape codes. This can help you quickly identify warnings, errors, or other important messages during development.

Example: Adding Color to Logs

You can add foreground and background colors to your log messages like this:

# Yellow text
Rails.logger.warn("\e[33mThis is a yellow warning message\e[0m")

# Red text with yellow background
Rails.logger.error("\e[31;43mThis is an error with a yellow background\e[0m")

• \e[33m sets the text color to yellow.
• \e[31;43m sets the text color to red and the background to yellow.
• \e[0m resets the color to default.

Note: Colors will only appear in the console (stdout), not in log files. Log files will contain the raw escape codes as plain text.

Common ANSI Color Codes

Code	Effect
\e[31m	Red text
\e[33m	Yellow text
\e[41m	Red background
\e[43m	Yellow background
\e[0m	Reset to default

Use colored logs to make important messages stand out during development!