If every color bar represents one letter, use this table to decode it:
Code:
English Letter Frequency
E 12.51%
T 9.25
A 8.04
O 7.60
I 7.26
N 7.09
S 6.54
R 6.12
H 5.49
L 4.14
D 3.99
C 3.06
U 2.71
M 2.53
F 2.30
P 2.00
G 1.96
W 1.92
Y 1.73
B 1.54
V 0.99
K 0.67
X 0.19
J 0.16
Q 0.11
Z 0.09
A bit of guessing and fine-tuning / adjusting should do the trick.