Feature: update colour themes

[gcharest]

🌞 Light Theme

Element	Color	Description
Primary	#2AB7CA	Teal — fresh, clean, and health-oriented
Accent	#F4A261	Warm orange — adds energy and friendliness
Background	#FFFFFF	Crisp white — maximizes readability and cleanliness
Text (Primary)	#2A2A2A	Deep gray — softer than black, easy on the eyes
Secondary Text	#5F6F7A	Muted slate — for labels and helper text
Button Hover	#218E9F	Slightly darker teal for interactive feedback

🌙 Dark Theme

Element	Color	Description
Primary	#2AB7CA	Same teal — maintains brand consistency
Accent	#E76F51	Deep coral — adds warmth and contrast
Background	#1E1E1E	Charcoal black — modern and low-glare
Text (Primary)	#E0E0E0	Soft light gray — readable without harsh contrast
Secondary Text	#A0A0A0	Dim gray — for subtle UI elements
Button Hover	#1F9AAE	Brighter teal for hover feedback