The register
The register lists Coloursonic Ltd in Maida Vale as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Coloursonic Limited, number 03492128, incorporated 1998: 28 years of filings behind the name. Registered office: 40 Chippenham Mews, Maida Vale, London, W9 2AW, W9 2AW. By its SIC codes the business is in manufacturing.
Holding a licence is the expensive, slow part done. For Coloursonic Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.