Here you go:
- Default Foreground: 131, 148, 150
- Default Bold Foreground: 147, 161, 161
- Default Background: 0, 43, 54
- Default Bold Background: 7, 54, 66
- Cursor Text: 0, 43, 54
- Cursor Colour: 131, 148, 150
- ANSI Black: 7, 54, 66
- ANSI Black Bold: 0, 43, 54
- ANSI Red: 220, 50, 47
- ANSI Red Bold: 203, 75, 22
- ANSI Green: 133, 153, 0
- ANSI Green Bold: 88, 110, 117
- ANSI Yellow: 181, 137, 0
- ANSI Yellow Bold: 101, 123, 131
- ANSI Blue: 38, 139, 210
- ANSI Blue Bold: 131, 148, 150
- ANSI Magenta: 211, 54, 130
- ANSI Magenta Bold: 108, 113, 196
- ANSI Cyan: 42, 161, 152
- ANSI Cyan Bold: 147, 161, 161
- ANSI White: 238, 232, 213
- ANSI White Bold: 253, 246, 227
(N.B.: You can download a portable version of PuTTY that doesn't require admin privileges and stores its configuration in a local file instead of the registry. You can then edit those files with a text editor.)