Table 2.

Isochromatic fringe-order pattern according to color change

Fringe color	Fringe order (N)
Black	0
Gray	0.28
White	0.45
Pale yellow	0.60
Orange	0.79
Dull red	0.90
Red–blue transition (purple)	1
Deep blue	1.06
Blue-green	1.20
Green-yellow	1.38
Orange	1.62
Rose red	1.81
Red–green transition (purple)	2
Green	2.33
Green-yellow	2.50
Red	2.67
Red–green transition	3
Green	3.10
Pink	3.60
Pink–green transition	4