An old tin label can help identify the intended colour, but the existing wall may have aged. Tell Fix Nik whether paint is available and how it has been stored. An identical colour name does not promise an invisible match.
Staining from a leak or damp wall needs its cause addressed before a cosmetic finish is considered. Explain any moisture history and whether the area is dry. Touch-up paint is not a remedy for an active leak or concealed building defect.
A repaired spot can remain visible because its sheen differs from the surrounding paint. Side lighting often reveals that difference. Include a wider room view and discuss the finish expectation before deciding whether to paint a tiny area or a complete bounded section.
The agreed service covers sound interior walls, light preparation, agreed local coating and colour-match assessment. Exclusions: Whole-house repainting, external facades, unresolved damp, lead/asbestos disturbance, structural patch work.