The textile industry poses a lot of environmental issues due to the number of resources it uses and the waste it produces, inspiring the constant search for technologic solutions that allow for the implementation of more sustainable and efficient industrial processes. Due to the flexibility of NIR spectroscopy, it presents itself as suitable for on-line monitoring and control of processes, by eliminating the need for sample preparation while accomplishing rapid non-destructive analysis. The objective of this work is to predict the point in which the desired color is achieved, in the textile dyeing process. NIR spectra of the dyeing operations were collected, and using chemometric techniques it was possible to develop prediction models and apply them at industrial scale. The integration of NIR spectroscopy for the on-line monitoring and control of textile dyeing will unlock the production of more sustainable and higher-quality products.