Nope.

In both the Viking and Pathfinder cases, the conclusion that some surfaces had a blue-green tint came from readings from the different color channels, that is, a surface is described as having a "bluish" tint when it reflects most strongly in the blue channel of the imager or camera. This is described clearly in the two reports:

Soil Stratiography and Rock Coatings Observed in
Color Enhanced Viking Lander Images,
by Edwin Strickland,
Proceedings of Lunar and Planetary Science 10, Volume 3, pp.
1192-1194 (1979),
http://adsabs.harvard.edu/cgi-bin/bib_query?1979LPI....10.1192S

Blue Mars
http://www.lpi.usra.edu/meetings/lpsc2000/pdf/1938.pdf

It is also interesting that in the first report by Strickland he also observed a blue-green tint to the soil in some patches underneath the red colored soil at the Viking sites, as the Pathfinder team did on the (presumed) subsurface of rocks. This blue-green soil was revealed in some cases by the Viking lander exhaust engines.

Found a report that observed such layering caused by microbial communities in desert environments on Earth that might be analogous to what was observed on Mars:

Morphological and Geomicrobiological Characteristics of an Endolithic Microbial Community from the Badwater Basin, Death Valley, California.
Eleventh Annual V. M. Goldschmidt Conference (2001)
"Here, we report our initial results from
an investigation of the evaporite crust from
the Badwater Basin and its resident
endolithic microbial community. The grey-white
mineral crust, consisting almost
entirely of gypsum (CaSO4 ·2H2 O), is
approximately 1 m thick, with the top 5-8
cm occupied by a microbial community.
This appears as a series of layers, orange-brown,
blue-green, pink-red, olive green,
and dark grey corresponding to microbial
layers dominated by diatoms, cyanobacteria,
purple bacteria, green bacteria, and sulfate
reducers, respectively, each 0.3-0.6 cm
thick. "
http://www.lpi.usra.edu/meetings/gold2001/pdf/3192.pdf

Bob Clark