How's this grab you Tiny?
- It's one of the nView Tools, 'Calibration Screen', for adjusting flat panel displays.
The pic was taken under artificial room-light, - I have not done any colour correcting. - but of course it's had to be compressed a lot to post here, - but you get the point!
ps. YT, - I think Marian or Ed have the smiley record, - at least for on one line they do!