Code of Federal Regulations (Last Updated: July 5, 2024) |
Title 33 - Navigation and Navigable Waters |
Chapter I - Coast Guard, Department of Homeland Security |
SubChapter NN - Deepwater Ports |
Part 149 - Deepwater Ports: Design, Construction, and Equipment |
Subpart E - Aids to Navigation |
Specifications for Lights |
§ 149.727 - Chromaticity.
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The color emitted by a light at all angles, within the 50% effective intensity angle under § 149.723 must have chromaticity coordinates lying within the boundary defined by the corner coordinates in Table 149.727 when plotted on the International Commission on Illumination (CIE) Standard Observer Diagram.
Table 149.727—Chromaticity Coordinates Color Chromaticity coordinates x axisy axisWhite 0.285 0.332 .453 .440 .500 .440 .500 .382 .440 .382 .285 .264 Green .009 .720 .284 .520 .207 .397 .013 .494 Red .665 .335 .645 .335 .680 .300 .700 .300 Yellow .560 .440 .555 .435 .612 .382 .618 .382