Replace hardcoded rgb values with css variables

[ValentinTT]

Replace hardcoded RGB values with CSS variables for improved code flexibility and maintainability.

Proposed Changes:

• Identify and replace all hardcoded RGB values with CSS variables.

Expected Benefits:

• Enhanced code flexibility and customization.
• Improved code maintainability and readability.

Note:

• IDA's CSS-based language defines variables using the syntax: @def variable value;.
• Consider defining variables' value using RGB values only, like: @def colorGreen 64, 160, 43;. This allows using the same variable for both RGB and RGBA values, e.g., rgba(${colorGreen}, 0.80).
• Alternatively, you can consider replacing all RGBA functions with the IDA @lighten macro for the desired effect.