Color RGBx number

[macbahi]

Hello,

In the past past I used a Color RGBx name as shown in picture enclosed. But now I want to use Color RGBx number as: 
Red 0xFF0000;  Bleu 0x0000FF  .....etc.   but some colors I didn't find their number as MedGray, scream, MoneyGreen and more.

I had looking in manual but without result.

Please Could you tell me where can I find the color RGBx numbers mentioned in the picture.

Thanks for help.

With best regards