UIColorのlight/dark RGB

UIColor	light	opacity	dark	opacity
systemGray	8E8E93	100%	8E8E93	100%
systemGray2	AEAEB2	100%	636366	100%
systemGray3	C7C7CC	100%	48484A	100%
systemGray4	D1D1D6	100%	3A3A3C	100%
systemGray5	E5E5EA	100%	2C2C2E	100%
systemGray6	F2F2F7	100%	1C1C1E	100%
label	000000	100%	FFFFFF	100%
secondaryLabel	3C3C43	60%	EBEBF5	60%
tertiaryLabel	3C3C43	30%	EBEBF5	30%
quaternaryLabel	3C3C43	18%	EBEBF5	16%
systemBackground	FFFFFF	100%	000000	100%
secondarySystemBackground	F2F2F7	100%	1C1C1E	100%
seconderySystemGroupedBackground	FFFFFF	100%	1C1C1E	100%
tertiarySystemBackground	FFFFFF	100%	2C2C2E	100%

let colors: [UIColor] = [
    UIColor.systemGray,
    UIColor.systemGray2,
    UIColor.systemGray3,
    UIColor.systemGray4,
    UIColor.systemGray5,
    UIColor.systemGray6,
    UIColor.label,
    UIColor.secondaryLabel,
    UIColor.tertiaryLabel,
    UIColor.quaternaryLabel,
    UIColor.systemBackground,
    UIColor.secondarySystemBackground,
    UIColor.secondarySystemGroupedBackground,
    UIColor.tertiarySystemBackground,
]

List {
    ForEach(colors, id: \.hashValue) { color in
        HStack {
            Rectangle()
                .frame(width: 20, height: 20)
                .foregroundColor(Color(color))
            Text(colorMeu(color))
            Text(colorHoge(color))
        }
    }
}

func colorMeu(_ color: UIColor) -> String {
    let meu = color.resolvedColor(with: UITraitCollection(userInterfaceStyle: .dark))
    let components = meu.cgColor.components!
    var str = [String]()
    if components.count == 4 {
        for i in (0 ..< 3) {
            str.append(String(Int(components[i] * 255), radix: 16, uppercase: true))
        }
        str.append("\(Int(components[3] * 100))%")
    } else if components.count == 2 {
        str.append(String(Int(components[0] * 255), radix: 16, uppercase: true))
        str.append("\(Int(components[1] * 100))%")
    }
    return str.joined(separator: ",")
}

func colorHoge(_ color: UIColor) -> String {
    var desc = color.description
    if desc.contains("name") {
        desc = desc.components(separatedBy: "name = ").last!
        desc.removeLast()
    }
    return desc
}