In educational situation at school, a teacher should show the important point of the presented pattern clearly in order to give a better understanding to his learners. Recently the overhead projector (OHP) has become popular as a means of presenting information, and when the teacher wants to call the learner's attention, he usually uses the colored transparency (TP) etc. In this paper, the color effectiveness are presented for the OHP presentation. The effectiveness was measured by the eye camera from the movement of the subject's visual point for the presented patterns. Eight subjects were measured each, and resulted data were analyzed statistically. As a result, it is shown that the primary colors of red, blue, green are more attractive than the compound colors of purple, orange, yellow, brown.