Hi Sid,
I think it would be a better approach to first design the logo and branding with vector-based tools like Adobe Illustrator / Affinity Design. Then you will have 100 % control over the colors along the entire logo. This logo can now be used on websites, on printed media in any size, expressing and making part of the companies branding.
When the customer is satisfied you could bring the vector design (SVG) to a 3D environment or design it from scratch. At that point it is perfectly normal that colors over the object change based on lighting, material properties and camera angles. I wouldn’t expect otherwise.
That is why you see CG Cookie logos with different orange colors. Probably 3D models with the exact same orange base color, but due to lighting and material properties slightly different.
What specific 3D requirements does the customer have? For now, if it’s only for a logo I would say Blender is not the right tool for the job at this moment.
