Both aircraft were initially overall ANA 613 Olive Drab. I have seen just one photo of the TCO-011 in e.g. the book of Hugo Hooftman, showing a rather dark coloured aircraft with black serials.
In the book "Army Co-operation bij de Militaire Luchtvaart in Indië 1946 - 1950 written by P.C. Boer, a photo us shown of the R-334. The aircraft seems to be of a light colour with black serials.

Scheme Colour name FS number BS-number Humbrol XtraColor Vallejo Model Color Vallejo Model Air
Serials TCO-010 and TCO-011, overall Olive Drab [faded].
Standard #1 Overall Olive Drab ANA 613     66 X113 70.887  
Serial R-334
Standard #2 Overall Aluminium Dope   56 / 191   70.864  

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.

Taylorcraft-L2-Grasshopper-1-SMALL
Scheme 1: Taylorcraft L-2M grasshopper.
The first scheme, overall olive drab with Dutch Flag as national markings.
Tweede Kleurenschema layorcraft L-2M.
Scheme 2: Taylorcraft L-2M Grasshopper.
The second scheme, overall aluminium dope with Dutch flag and serial in black on the tail.
Derde Kleurenschema layorcraft L-2M.
Scheme 3: Taylorcraft L-2M grasshopper.
The third scheme, overall aluminium dope with Dutch roundels and serial in black on the fuselage.