<s>
Clearlooks	B-Application
is	O
a	O
theme	O
for	O
GTK	B-Application
,	O
the	O
main	O
widget	B-Library
toolkit	I-Library
used	O
by	O
the	O
GNOME	B-Application
desktop	I-Application
environment	I-Application
.	O
</s>
<s>
It	O
is	O
based	O
on	O
Red	O
Hat	O
's	O
Bluecurve	B-Language
theme	O
.	O
</s>
<s>
It	O
was	O
the	O
default	O
theme	O
for	O
GNOME	B-Application
since	O
version	O
2.12	O
until	O
GNOME	B-Application
3	O
when	O
it	O
was	O
replaced	O
by	O
Adwaita	B-Language
.	O
</s>
<s>
The	O
creators	O
of	O
the	O
Clearlooks	B-Application
GTK+	B-Application
theme	O
were	O
Richard	O
Stellingwerff	O
and	O
Daniel	O
Borgmann	O
;	O
however	O
,	O
since	O
2005	O
the	O
theme	O
has	O
been	O
developed	O
by	O
GNOME	B-Application
,	O
and	O
current	O
developers	O
are	O
Andrea	O
Cimitan	O
and	O
Benjamin	O
Berg	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
Clearlooks	B-Application
uses	O
cairo	B-Language
as	O
a	O
backend	O
.	O
</s>
<s>
Older	O
releases	O
just	O
use	O
GDK	B-Language
to	O
draw	O
the	O
widgets	O
.	O
</s>
<s>
Qt	B-Language
,	O
versions	O
4.2	O
to	O
4.4	O
,	O
use	O
a	O
port	O
of	O
Clearlooks	B-Application
called	O
Cleanlooks	O
to	O
better	O
integrate	O
with	O
GTK	B-Application
applications	O
.	O
</s>
<s>
Since	O
the	O
departure	O
of	O
the	O
GNOME	B-Application
Project	O
from	O
the	O
development	O
of	O
GNOME	B-Application
2	O
and	O
GTK+	B-Application
2	I-Application
,	O
developers	O
forked	O
GNOME	B-Application
2	O
and	O
created	O
the	O
MATE	B-Language
desktop	I-Language
environment	O
.	O
</s>
<s>
It	O
still	O
contains	O
almost	O
all	O
GNOME	B-Application
2	O
features	O
and	O
themes	O
.	O
</s>
<s>
The	O
Clearlooks	B-Application
theme	O
is	O
called	O
TraditionalOK	O
in	O
MATE	B-Language
.	O
</s>
<s>
Furthermore	O
,	O
a	O
user	O
by	O
the	O
name	O
of	O
jpfleury	O
on	O
Gnome-Look	O
has	O
recreated	O
Clearlooks	B-Application
for	O
GTK+	B-Application
3	I-Application
,	O
called	O
Clearlooks-Phenix	O
.	O
</s>
