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Ahhhhh! What you say about them reading in the L-a-b values may very well be the key here - unless of course, it is the exact same library performing the colour-space transformation each time.

I mean, the RGB values are also available in each line and as far as a colour-picker is concerned, are entirely unambiguous. While different monitors/printers may display the same RGB value in a way that appears differently to our eyes and would produce different RGB values if a photograph of the results are compared.

However, the first paragraph from the wikipedia page on Lab color space[^] may possibly hold the key to the different results. It says:


A Lab color space is a color-opponent space with dimension L for lightness and a and b for the
color-opponent dimensions, based on nonlinearly compressed (e.g. CIE XYZ color space) coordinates.
The terminology originates from the three dimensions of the Hunter 1948 color space, which are L,
a, and b.[1][2] However, Lab is now more often used as an informal abbreviation for the L-a-b
representation of the CIE 1976 color space (or CIELAB, described below). The difference between
the original Hunter and CIE color coordinates is that the CIE coordinates are based on a cube root
transformation of the color data, while the Hunter coordinates are based on a square root
transformation.
Other examples of color spaces with Lab representations include the CIE 1994
color space and the CIE 2000 color space.
(emphasis mine)


Reading on further, I was reminded that there are a number of systems based on Lab and importantly, they do not all employ the same conversion formula to rgb

I'll bet that if you plug the Lab values (53.75, 43.63, 28.62) given for the colour you mentioned into the different formulas one of them will give you 198,93,82 and another of them will give you 120,27,20

Naturally, the contents of my comment are entirely moot if the exact same code is used to convert from Lab -> RGB and also if the tests are performed on different machines, since RGB values are device-dependant, while Lab values are not.

What a curly problem you have! D'Oh! | :doh:
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