Liland, I found this:

1868, Oct. 11

Ellen Swallow, '70, wrote to her mother: "I send you a bit of our college colors, rose and silver gray... One and onehalf yards each we have and wear in some form on public occasions." The colors signified the dawn of women's education, "the rose of sunlight breaking through the gray of women's intellectual life."
from http://vassun.vassar.edu/~daniels/1861_1870.html

That is all Copernic Search had. Sorry.