A Color convenience extension to make adaptable UIColors more accessible in SwiftUI.

Color+systemColors.swift

extension Color {
    static let systemRed = Color(UIColor.systemRed)
    static let systemGreen = Color(UIColor.systemGreen)
    static let systemTeal = Color(UIColor.systemTeal)
    static let systemBlue = Color(UIColor.systemBlue)
    static let systemYellow = Color(UIColor.systemYellow)
    static let systemOrange = Color(UIColor.systemOrange)
    static let systemPink = Color(UIColor.systemPink)
    static let systemPurple = Color(UIColor.systemPurple)
    static let systemIndigo = Color(UIColor.systemIndigo)
    static let systemGray = Color(UIColor.systemGray)
    static let systemGray1 = Color(UIColor.systemGray2)
    static let systemGray3 = Color(UIColor.systemGray3)
    static let systemGray4 = Color(UIColor.systemGray4)
    static let systemGray5 = Color(UIColor.systemGray5)
    static let systemGray6 = Color(UIColor.systemGray6)

    static let systemPlaceholderText = Color(UIColor.placeholderText)
    static let systemLink = Color(UIColor.link)
    static let systemSeparator = Color(UIColor.separator)
    static let systemOpaqueSeparator = Color(UIColor.opaqueSeparator)

    static let systemLabel = Color(UIColor.label)
    static let systemLabelSecondary = Color(UIColor.secondaryLabel)
    static let systemLabelTertiary = Color(UIColor.tertiaryLabel)
    static let systemLabelQuaternary = Color(UIColor.quaternaryLabel)
    static let systemFill = Color(UIColor.systemFill)
    static let systemFillSecondary = Color(UIColor.secondarySystemFill)
    static let systemFillTertiary = Color(UIColor.tertiarySystemFill)
    static let systemFillQuaternary = Color(UIColor.quaternarySystemFill)
    static let systemBackground = Color(UIColor.systemBackground)
    static let systemBackgroundSecondary = Color(UIColor.secondarySystemBackground)
    static let systemBackgroundTertiary = Color(UIColor.tertiarySystemBackground)
    static let systemGroupedBackground = Color(UIColor.systemGroupedBackground)
    static let systemSecondaryGroupedBackground = Color(UIColor.secondarySystemGroupedBackground)
    static let systemTertiaryGroupedBackground = Color(UIColor.tertiarySystemGroupedBackground)
}