Adaptive Text Color Extension

AdaptiveColorExtension.swift

import SwiftUI
extension Color {
    // Credit for this goes to https://swiftandtips.com/adaptive-text-color-in-swiftui-based-on-background
    // This is a slightly modified version to use Computed properties instead of functions
    var luminance: Double {
        // perceived brightness of a color  0...1
        // Convert SwiftUI Color to UIColor
        let uiColor = UIColor(self)
        // Extract RGB values
        var red: CGFloat = 0
        var green: CGFloat = 0
        var blue: CGFloat = 0
        uiColor.getRed(&red, green: &green, blue: &blue, alpha: nil)
        // Compute luminance (take into account the sensitivity of color to the human eye.
        // The higher the number, the lighter the color
        return 0.2126 * red + 0.7152 * green + 0.0722 * blue
    }
    
    var luminance2: Double? {
        guard let components = UIColor(self).cgColor.components else { return nil }
        
        return 0.2126 * components[0] + 0.7152 * components[1] + 0.0722 * components[2]
    }
    
    var adaptedTextColor: Color {
        luminance > 0.5 ? Color.black : Color.white
    }
    
    var components: String {
        guard let components = UIColor(self).cgColor.components else { return "" }
        
        return "\(0.2126 * components[0]), \(0.7152 * components[1]), \(0.0722 * components[2])"
    }
}