Image coloring problem

Hello.......

I am in the process of building a website for a friend, who wants to use
exclusively black-line images on a lavender background. I have found some
excellent black-and-white graphics, and have been trying to convert them for
the pale lavender background that my friend wants for her site. I've done
two images so far. One of them came out beautifully, the other one shows up
as having a much lighter background than that used for the page. (Not white,
not the pale lavender, but an even paler lavender.)

The page I'm working on can be seen at
http://www.geocities.com/mothers_wisdom/frameset.html.
As you can see, the little bouquet of flowers over the navigation bar looks
fine. What I did was this....in PSP, I copied the image of the flowers and
then pasted it on a blank image that had the desired background color. I did
have to use the Delete key to erase a couple of lingering white areas, but
it worked beautifully.

However, when I tried to do the same thing with the larger image (the farm
scene), the image that was pasted was not black-line, but instead a darker
shade of lavender, and rather muddy. So, I tried using the flood fill tool
to replace the white background with the lavender color. I know that the
color I was using in my flood fill tool was the same as the page background,
and yet twice the end result had the even paler shade of lavender.

Anyone have any ideas? I'm sure there's a very simple solution to this, I'm
just not seeing it at the moment.

Thanks in advance,
Jami

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