This section is from the book "The Practical Book Of Interior Decoration", by Harold Donaldson Eberlein, Abbot Mcclure, Edward Stratton Holloway. See also: The Victorian House Book: A Practical Guide to Home Repair and Decoration.
Circumstances vary so greatly that it is unwise to give hard and fast rules, but in general it may be said that if over-curtains are used at windows it is advisable that at doorways (the corresponding apertures) the same colouring should be employed, or at least that the colouring of the one should be in relation to that of the other: if, for instance, the window hangings are to be of blended tones, the portieres might be either the same or solid colour of one of the principal of those tones.
If there are no coloured curtains at the windows the choice of materials for portieres is then limited only by general appropriateness and the necessity of harmony with other decorations.
The popular supposition that portieres must always be heavy is, of course, unjustified. They should often be opaque - as at bedroom doors - but frequently light and unlined curtains give delightful effects.
The objection that door curtains are in the way seems also unfounded for they may be pulled back to either side of the doorway, or to both sides where they are double, in the case of wide doorways. Certainly uncurtained doorways, though not nearly to so great a degree as uncurtained windows, have a bare and unfinished effect. It is, by the way, well to leave most doors on, as it is rarely the case that they are not at some time needed.
It will have been seen how many circumstances there are to consider in the apparently simple matter of the furnishing of windows. It is, however, precisely this advance consideration that avoids costly mistakes. The harmony of our hQme depends largely upon what we do in this direction: we may have rooms irritating to the nerves through their glare, their dullness or their harshness; or restful and full of happy charm, because of a pleasing and sufficient diffusion of light, rightly placed and harmonious in tone.