Derwent Studio.

See the Colour Chart here  and select from the Available Options to request individual colours. .

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Precise, perfect colour.
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If you like the texture and blendability of Artists colour pencils, but prefer a crisper, more precise drawing style, this pencil is for you.
Studio shares the same colour core as Artists, but it is slimmer and the wood barrel is hexagonal rather than round.
The result? A colour pencil that is easy to grip and particularly suited to detailed illustration work, such as botanical studies, architectural drawing and graphic design.
All tend to be studio-based – hence the name.