With Spectrum, the Colori Ensemble presents it's third album for Aliud Records in close collaboration with the Frisian Music Archive. Earlier releases were Colori Miti (2015) and Evasio (2019). The ensemble's name derives from the composition Colori by the composer Wim van Ligtenberg, written in 2012. Since then, various composers have dedicated their compositions to the ensemble. Apart from new, contemporary repertoire, the ensemble performs their own arrangements of classical masterpieces. The members of the ensemble are Rianne Jongsma (flute), Wilma Jongsma (oboe), Arjan Jongsma (marimba) and Frans Douwe Slot (piano). They performed in numerous venues and at various festivals, among which the International Chamber Music Festival Schiermonnikoog, the Nieuwe Kerk in The Hague and the Concertgebouw in Amsterdam. Radio performances were broadcasted by Radio 4 in programmes like Passaggio, de Klassieken, Podium, Spiegelzaal and Muziekwijzer.