colored sketchbook

I have used sketchbooks for years.  They refine my drawing, are a great space for generating ideas, and a place I draw friends.

Recently, I have come across a couple of my favorite artists who use a sketchbook with brown paper-bag colored pages.  The work inside is done with black and white.  This gives a more color ready sketch.
By working with the white tones as well as the structure lines - the artist would be more aware of the use of light in the composition.  By using a sketchbook, you would become more aware and familiar of structures and blocks of light against the dark.  Brilliant!  The artist is suppose to command the viewer's eyes, their experience of the work - and lighting is a great way to do it.  It's something I want to become more aware of.  I always tell people I work on toned paper so that I am highlighting up and shading down.  I understand!
So, I ran out and bought a colored paper sketchbook.  Lovely.  My size.

pbpbpbpptttt!
I haven't got the hang of it.  I go back to the white books where I can see the lines of my composition more.  I am still sketching in black and white in my head.
Either I need to force myself more into the color book, go and find a grey paper book (since I am use to grey and not brown), or re-work the idea that it's a place to refine the light work - and not the line work of a painting.

working on it.  I will not give up!