fromColor

pub fn fromColor(color: Color) HSV {
        const r: f32 = @as(f32, color.r) / 255.0;
        const g: f32 = @as(f32, color.g) / 255.0;
        const b: f32 = @as(f32, color.b) / 255.0;
        const a: f32 = @as(f32, color.a) / 255.0;

        const max = @max(r, g, b);
        const min = @min(r, g, b);
        const delta = max - min;

        const h = 60 * (if (delta == 0)
            0
        else if (max == r)
            @mod((g - b) / delta, 6)
        else if (max == g)
            (b - r) / delta + 2
        else if (max == b)
            (r - g) / delta + 4
        else
            unreachable);

        const s = if (max == 0) 0 else delta / max;

        return .{ .h = h, .s = s, .v = max, .a = a };
    }