Micro-optimization, or worrying about performance during development can be a waste of time. Most likely the improvement you make won’t be in the critical path, will be negligible, or worst of all increase the complexity and readability of your code for a minimal advantage.
These software engineering rules and testing best practices might help save you time and headaches.
You can set a mood with colors, draw attention, or make a statement. To energize or cool down, you can use color. You can create an atmosphere of elegance, warmth or tranquility by choosing the right color scheme, or you can convey an image of playful youthfulness.