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| 1 | import SwiftUI |
| 2 | |
| 3 | extension Color { |
| 4 | init(hex: String) { |
| 5 | let value = UInt64(hex.trimmingCharacters(in: CharacterSet(charactersIn: "#")), radix: 16) ?? 0 |
| 6 | self.init( |
| 7 | .sRGB, red: Double((value >> 16) & 255) / 255, green: Double((value >> 8) & 255) / 255, |
| 8 | blue: Double(value & 255) / 255, opacity: 1) |
| 9 | } |
| 10 | static func oklch(_ l: Double, _ c: Double, _ h: Double) -> Color { |
| 11 | let a = c * cos(h * .pi / 180) |
| 12 | let b = c * sin(h * .pi / 180) |
| 13 | let x = pow(l + 0.3963377774 * a + 0.2158037573 * b, 3) |
| 14 | let y = pow(l - 0.1055613458 * a - 0.0638541728 * b, 3) |
| 15 | let z = pow(l - 0.0894841775 * a - 1.291485548 * b, 3) |
| 16 | func gamma(_ v: Double) -> Double { |
| 17 | min(1, max(0, v <= 0.0031308 ? 12.92 * v : 1.055 * pow(v, 1 / 2.4) - 0.055)) |
| 18 | } |
| 19 | return Color( |
| 20 | .sRGB, red: gamma(4.0767416621 * x - 3.3077115913 * y + 0.2309699292 * z), |
| 21 | green: gamma(-1.2684380046 * x + 2.6097574011 * y - 0.3413193965 * z), |
| 22 | blue: gamma(-0.0041960863 * x - 0.7034186147 * y + 1.707614701 * z), opacity: 1) |
| 23 | } |
| 24 | } |
| 25 | |
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