Color of title bar is magenta, BUG?

Yosemite
the color of title bar is not absolutely gray, it looks like magenta.
use color meter can confirm this problem.
in OSX 10.9, it is gray, but in OSX 10.10, it is magenta.
Is this a bug?
I can't insert image, you can see it here:
https://hrs73q.bn1301.livefilestore.com/y2pcBTHB7Mh1J4ojwuwBkuhxBdE9uiARhKXmc3tj 20_6s_712N9MiEb9l4sHgjb3vMzPHcERk5ZewypaO7xfE1WDUCrkuWLv0Upbh3F671TWVk/1.png
=======================
在Yosemite的标题栏上，活动窗口的标题栏颜色不是灰色，而是洋红色。
使用取色器可以确定它颜色真的很奇怪。
在OSX10.9中，确实是灰色的。而在10.10中则是洋红色。
请问这是BUG吗？

etresoft wrote:
It is a feature. The menu bar will change colour based on what is behind it.
No - this is not true for Toolbars. They are not translucent to stuff outside of themselves. Only to content inside of them. As with Safari.
At least on this system, Finder, Safari, System Preferences and any app with a toolbar is NOT translucent to its background. Only in Safari's to the content viewed within it like the Finder Side Bar...
To OP - It looks like bug. To me.
One that I can personally NOT recreate here.
Try this
Goto System Preferences > Accessibility and select Display from the list.
Then check "Reduce Transparency" and see if goes away - if it does not... Report it to apple.

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