RGB color space - how to achieve in Photoshop?

I make several channels where the logos have pure blacks and whites in them. As I understand it, the colors must be between 16 and 235.

  1. Is this true for HD and SD?

  2. Does anyone have instructions for converting graphics to this color space automatically in Photoshop? I’m working with the latest CS6. I tried assigning the color profile NTSC SDTV which I believe is the same thing, but it does not convert the pure blacks and whites.

Thanks

Someone once suggested me to use Adobe Lightroom but I haven’t been able to do that yet

Yes you can achieve it through Lightroom. The Lightroom has feature to adjust the color saturation and temperature in the image. so use Lightroom for RGB color space instead of photoshop.

Yes it can be achieved in Lightroom

RGB colour space is available in photoshop