Shoutbox

but there already is color replacement

I'm not sure if it can replace gradients

but there definitely is just color replacements

code:

---

<Replace>
<Colors>
<Color Id="#">
  <R>0</R>
  <G>0</G>
  <B>0</B>
  <A>255</A>
</Color>
</Colors>
</Replace>

---

or for colorized colors

code:

---

<Replace>
<Colors>
<Color Id="#">
  <I>100</I>
  <A>255</A>
</Color>
</Colors>
</Replace>

---