"In the great times we are living, when man can finally tame the formerlyalmighty nature (exterior and interior) colour is bound to play, thanks toits psychogenetic qualities, three very important roles in man-made space:a) that of attributing to it its time dimension (continutiy, rythm, gesture),not antagonistically to plastic structure but over it, within the frame of aconstantly evolving metastructure of interweaving semiotic networks. Tothis contribute the relative flexibility and inexpensiveness of colour coat-ings; b) Establishment of beauty as an overall factor of the total appearanceof the urbanscape and as opposed to any individual "I amcurious blue" state-ment; c) Restitution of ecological symbolicness, following the pardingm ofnature, through element and group colour rendering.Rules of a design strategy should be: a) Tolerances of man's adaptation levelaccording to the Macclelland theory of "affect" allowing for moderate fluctu-ations of the stimulation level above or below the usual; b) according to thesame theory, the possibility of constant change of the adaptation level forconstant change of the previously adapted to stimulation level; c) Control ofthe quality and quantity of perceptual input to avoid lowering of the perfor-mance of the human mind, due to system-maximization (adaptation to thefamiliar, good or bad; d) Regulation of the reflexivity of the elements of thebuilt milieu (stronger or weaker) so as to allow a degree of unlearning lib-erating attention for inner visions normally projected on axterior planes;e) Above all a transcendent overall conceptual context based on self-awareness, inciting no less than "let me be another wonderful blue" state-ments. Toots for a design realisation are object properties (optical properties,physical form, illumination). Factors to be taken into consideration are en-vironmental (contextual, geographical, social) ones, biological (need &survival, aesthetic and medical) ones and the learning mechanism of the-brain (perception, connotation, cognition). The last one is of great impor-tance and accounts for man's simultaneous awareness of his individuality andhis belongingness to totality (spatial, temporal, social, cultural, archety-pal, etc.)The International architecture has at times offered examples of such and"organic" colour rendering that are worth examining and being taught by.The Workshop of Semiotiac Applications of Colour of the Section of Arhitec-ture of the University of Thessaloniki has been involvd In research basedprojects thereup for the last four years."