[GWELLS-2270] FIX** Change to aquifer colour

[lunamoonmoon]

Pull Request Standards

• The title of the PR is accurate
• The title includes the type of change [HOTFIX, FEATURE, etc]
• The PR title includes the ticket number in format of [GWELLS-###]
• Documentation is updated to reflect change [README, functions, team documents]

Description

This PR includes the following proposed change(s):

• Change of aquifer line and fill colour to Hex #686868 (green)
• Before change cadastral and aquifers were both orange
• 
• On Hover
• Searched aquifer still shows as purple while others are now green instead of orange

[lunamoonmoon]

Talked to Su and changed to red (Hex # de2d26)

• selected
• unselected