NX3 introduces a new color pallete, Here is the conversion
Prior to NX3 the original 15 UG colors where in the color pallete as 1 -> 15, In NX3 the color pallete is completely redone to use a standard color pallete, which included moving the original 15 colors into the correct location and changing the RGB value to match the standard colors.
| NX2 | Name | NX3 |
| 1 | BLUE | 211 |
| 2 | GREEN | 36 |
| 3 | CYAN | 31 |
| 4 | RED | 186 |
| 5 | MAGENTA | 181 |
| 6 | YELLOW | 6 |
| 7 | WHITE | 1 |
| 8 | OLIVE | 137 |
| 9 | PINK | 112 |
| 10 | BROWN | 167 |
| 11 | ORANGE | 114 |
| 12 | PURPLE | 202 |
| 13 | DARK-RED | 198 |
| 14 | AQUAMARINE | 100 |
| 15 | GRAY | 130 |
NX3 ships with two color pallete file ugcolor.cdf and ugcolor_nx2.cdf. These files are located at UGII_BASE_DIR\ugii\
For example: C:\Program Files\UGS\nx3\UGII\ugcolor.cdf -or- ugcolor_nx2.cdf
These files are simple ascii text files with RGB values. When you compare the two files you will notice the values in the NX3 file are rounded to one place decimal value.