While illustrations and infographic elements may contain more details, icons should always remain as simple as possible.
Icons are typically used at relatively small sizes. To ensure they are easily perceived, outlines should be thick enough to retain clarity.
Always select the most visible colour version of the icon for each background colour. Powering Green is the primary icon colour. For maximum readability, use Ivy Green on light backgrounds and white on dark backgrounds. Lavender Purple can be used as an alternative on dark backgrounds. Use black icons only when no other colour options are suitable.