Ordinaire (1/4 comma)

offsets from equal temperament in cents

C   : +10.3
C#  :  -2.9
D   :  +3.4
Eb  :  +9.8
E   :  -3.4
F   : +13.7
F#  :  -4.9
G   :  +6.8
G#  :  -1.0
A   :   0.0
Bb  : +17.1
B   :  -6.8

Or, looking at 5ths

Bb–F–C–G–D–A–E–B: -1/4 pyth
G#–D#-Eb: +1/4 pyth
B–F#–C#–G#: pure

Pure thirds (to test)

G-D
D-F#
Bb-D
F-A