  With the popularization of cell phones, laptops, and tablets, Liquid Crystal
Displays (LCDs) have become one of the main types of User Interface (UI) in the
modern world. While LCDs are widely used for retrieving text information, the
impact of text formatting on the legibility is often overlooked. With the goal
of improving recognition efficiency (RE) on LCDs, this paper studies the impact
of font-background colors on RE of texts being presented on LCD. For this
purpose, difference between font/background color combinations, Primary Color
Difference (PCD), is introduced that brings efficient RE assessment under wider
spectrum. Accordingly, a testing platform is designed in C#. NET that captures
participants response time to different font-background color combination
stimuli. Based on the results, black background and green font color outperform
other tested colors especially when the PCD is maximized. In correspond to
results, Implications for using research outcome in prototype LCDs are
suggested.
