Color coding is becoming an important dimension in the presentation mode capabi lity of many information systems. Although color coded output, either alphanumeric or graphic, is of considerable intuitive appeal, there is litt le experimental data on its use or effects. An experimeent is reported which focuses on the effects of color enhanced information presentations. Information is presented to two groups of subjects differing the presentation mode only along the dimension of color coding. The subjects are later tested on the material presented. Analysis of the test results indicates a significant difference in the subjects' performance which is apparently attributable to the color coding of the presentation materials. Directions for further investigations are suggested.