The Design Lab at LEGO has finally agreed to share the company’s internal color scheme with the public. In the chart below, you can see the official LEGO color names with their corresponding color numbers.
Of course, there are differences between the names that LEGO gives to their colors and what we fans call them. Nevertheless, this is still very useful information, especially to improve communication with The LEGO Group regarding the LUGBULK Program.
You can download a high-res version (25 KB Adobe Reader PDF) as well.