PRINCIPLES OF COLOR. 



21 



Without thought of improving upon the above arrange- 

 ment, the author would nevertheless present the following 

 classification, as perhaps a more convenient one for the 

 purposes of the present work. 



I. Pure colors of the solar spectrum. 



a. Primary colors, or those not produced by mixture. 



1. Eed. 



2. Yellow. 



3. Blue. 



6. Secondary colors, or those produced by the mixture 

 of two primary colors. 



4. Orange (= red + yellow). 



5. Green (= yellow + blue). 



6. Purple (= blue + red). 



II. Impure colors, or those not found in the solar spectrum. 



a. Shades, which may consist of either primary or secon- 



dary colors 1 darkened by black (= complete or absolute 

 shade). 



b. Tints, which may consist oi eitber primary or secondary 



colors lightened by the admixture of white (= absolute 

 degree of light). 



c. Subdued colors, which consist of combinations of two 



or more secondary colors, or of a secondary color with 

 the primary which does not enter into its composition, 

 that is, its complementary color, as green with red, 

 purple with yellow, orange with blue, etc., — the effect 

 being to subdue or neutralize the colors which are thus 

 combined. 





1 The principal shades may be classified as follows : — 



a. Shades of primary colors. 



1. Of red (= red + black) = "maroon." 



2. Of yellow (= yellow + black ) = "olive." 



3. Of blue (=blue + black) =r "indigo," or "blue-black." 



b. Shades of secondary colors. 



4. Of orange (= yellow + red + black) =r brown. 



5. Of green (= yellow -f blue + black) = dark green, "bottle- 



green," "myrtle-green." 



6. Of purple (= blue + red + black) = "plum-purple." 







t 



