Jasline,
The background colors (black on flicker and white on your website) influences your perception of the color. I print-screened both of them and pasted them side by side on paint brush. Now they look the same for me.

Besides that, it looks like firefox and even chrome might have some issues with colorspace on flicker. Can you try another browsers to check if you see the same diferences?
There are some discussion about it on this flicker forum.
https://www.flickr.com/help/forum/en-us/72157658917085853/
Hope it helps
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This reply was modified 7 years, 8 months ago by Jazz Daniel.