Fabric and texture
The same dye colour looks genuinely different depending on the fabric it’s woven into — a matte cotton, a sheened silk and a deep-pile velvet in “the same” colour rarely look identical side by side. Practical, not exact-physical-prediction, guidance below.
Cotton, linen and wool
How do cotton, linen and wool affect a colour?
Silk and satin
Why does silk or satin look brighter than the same colour in cotton?
Velvet and suede
Why does velvet look deeper or darker than the same colour elsewhere?
Denim and leather
Why does denim or leather colour vary so much between pieces?
Metallic and sequined fabric
Why does a metallic or sequined garment change colour as it moves?
Sheer and transparent fabric
Why does a sheer fabric's colour depend on what's behind it?