The accent color in the input text entry is different from the one used in radio buttons, checkboxes and in shell and GDM text entries; also, it has poor contrast
Input text (Settings and Calendar) #5e7998
Shell and GDM #3584e4
By the way, this color is used in radio buttons and checkboxes and toggles.
The color used in these four elements is way better, because it has more contrast.