The truth is, that to get a green that is at once pure and neither cold nor rank, and not too bright to live with, is of simple things as difficult as anything a decorator has to do; but it can be done,- -and without the help of special material; and when done such a green is so useful, and so restful to the eyes, that in this matter also we are bound to follow Nature and make large use of that work-a-day colour green.
But if green be called a work-a-day colour, surely blue must be called the holiday one, and those who long most for bright colours may please themselves most with it; for if you duly guard against getting it cold if it tend towards red, or rank if it tend towards green, you need not be much afraid of its brightness. Now, as red is above all a dyer’s colour, so blue is especially a pigment and an enamel colour; the world is rich in insoluble blues, many of which are practically indestructible.
I have said that there are not many tints fit to colour a wall with: this is my list of them as far as I know; a solid red, not very deep, but rather describable as a full pink, and toned both with yellow and blue, a very fine colour if you can hit it; a light orangy pink, to be used rather sparingly. A pale golden tint, i.e., a yellowish-brown; a very difficult colour to hit. A colour between these two last; call it pale copper colour. All these three you must be careful over, for if you get them muddy or dirty you are lost.
Tints of green from pure and pale to deepish and grey: always remembering that the purer the paler, and the deeper the greyer.
Tints of pure pale blue from a greenish one, the colour of a starling’s egg, to a grey ultramarine colour, hard to use because so full of colour, but incomparable when right. In these you must carefully avoid the point at which the green overcomes the blue and turns it rank, or that at which the red overcomes the blue and produces those woeful hues of pale lavender and starch blue which have not seldom been favourites with decorators of elegant drawing-rooms and respectable dining-rooms.
You will understand that I am here speaking of distemper tinting, and in that material these are all the tints I can think of; if you use bolder, deeper or stronger colours I think you will find yourself beaten out of monochrome in order to get your colour harmonious.
One last word as to distemper which is not monochrome, and its makeshift, paper-hanging. I think it is always best not to force the colour, but to be content with getting it either quite light or quite grey in these materials, and in no case very dark, trusting for richness to stuffs, or to painting which allows of gilding being introduced.