C# 从KnownColor 中移除较深的颜色

我从系统中得到了一个 knowncolor 列表，但我想删除一些太暗并使前景字符不可见的列表。我尝试了以下代码，但KnownColor.Black 仍然出现。有没有办法通过他们的黑暗来命令他们？

if (knownColor > KnownColor.Transparent && knownColor < KnownColor.MidnightBlue && knownColor < KnownColor.Navy)
            {
                //add it to our list
                colors.Add(knownColor);
            }

最佳答案

您可以将已知颜色转换为 Color 实例，然后使用 GetBrightness() 方法比较亮度:

float brightness = Color.FromKnownColor(KnownColor.Transparent).GetBrightness();

应用于您的示例，如下所示应该可以工作(测试黑色和黄色):

KnownColor knownColor = KnownColor.Yellow;

float transparentBrightness = Color.FromKnownColor(KnownColor.Transparent).GetBrightness();
float midnightBlueBrightness = Color.FromKnownColor(KnownColor.MidnightBlue).GetBrightness();
float navyBrightness = Color.FromKnownColor(KnownColor.Navy).GetBrightness();
float knownColorBrightness = Color.FromKnownColor(knownColor).GetBrightness();

if (knownColorBrightness  < transparentBrightness
    && knownColorBrightness > midnightBlueBrightness
    && knownColorBrightness > navyBrightness)
{
    //add it to our list
    colors.Add(knownColor);
}

关于C# 从KnownColor 中移除较深的颜色，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/4881235/