Win 10, gtx970
Blender 2.8 91a155833e59
In 2.8, when you enter a color code, in the RGB node, like for example the color: "DAFF01"
and then you press enter, you will immediately see that the color code is changed in another color code.
If you select the code again, and press enter the code is changed again, and so on.
And seems that same goes to any other color input.