Page:JOSA-Vol 06-06.djvu/50

Table 13

Monochromatic Analyses of Certain Ridgway Colors*

1		2	3		4		5	6	7
No.		Name	λ(mμ)		Per cent. Hue		dλ	ds	ds
1		Spectrum Red		633	55		. . .	. . .	. . .
2				616	31		17	5.0	5.0
3				610	34		6	2.0	3.0
4				605	34		5	1.5	2.0
5		. . .	. . .		. . .		. . .	2.0	2.5
6		Orange Chrome		597	40		8	2.5	2.5
7				595	34		2	1.5	1.5
8				593	26		2	1.0	1.5
9				589	23		4	2.0	3.0
10				586	31		3	2.0	3.0
11				582	34		4	2.5	3.0
12		Lemon Yellow		579	29		3	3.0	3.0
13				577	34		2	2.0	2.0
14				574	39		3	2.0	2.0
15				509	42		5	3.0	3.0
16				566	42		3	2.0	2.0
17				548	47		18	6.0	8.0
18		Emerald Green		521	63		17	9.0	9.0
19				518	66		3	2.0	2.0
20				510	63		8	3.0	3.5
21				495	35		15	10.0	10.0
22				490	54		5	4.0	5.5
23				486	51		4	3.0	3.0
24				484	73		2	1.0	1.5
25		Spectrum Blue		479	70		5	2.0	2.5
26				476	57		3	2.0	2.0
27				470	62		6	3.0	3.0
28				460	62		10	3.0	4.0
29				445	58		15	5.0	8.0
30		Spectrum Violet		425	60		20	7.0	10.0
Mean		. . .	. . .		. . .		. . .	3.2	3.8
31	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	Purples	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	570	22		. . .	. . .	. . .
32				559	15		11	5	6
33				555	13		4	2	2
34				538	16		17	4	5
35				534	11		6	3	2
36				512	9	.4	22	7	8
Mean		. . .	. . .		. . .		. . .	4.2	4.6

• The numbers in column 1 show the spectral order of the thirty-six undiluted Ridgway chromas. Column 2 gives the names assigned to certain of the colors by Ridgway. Column 3 shows the wave-length of the dominant hue and column 4 the per cent. hue. Columns 5, 6, and 7 list the differences between succeeding members in wave-length, Steindler “hue scale,” and Jones “hue scale” units respectively (See Jones, Ref. 42, pp. 73-77).