1. INTRODUCTION

2. MEASUREMENTS OF THE Z~4 GALAXY SAMPLE

3. RESULTS
3.1. Galaxy Colors as a Function of Rest-Frame Optical Luminosity
3.2. UV Continuum Slopes and Balmer Breaks
3.3. Dust-Corrected UV-to-Optical Colors
3.4. Limits on the Predominance of Extremely Young Galaxy Ages
3.5. Fits to the Color Distribution at Z~4

4. DISCUSSION

5. SUMMARY