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. 2018 Jan 2;105(1):8. doi: 10.1007/s00114-017-1531-z

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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Spectral reflectances of the stimuli used in training and tests. Colour stimuli were designed in Adobe Photoshop (RGB for orange 255/100/0; green 110/187/73; bluish-green 0/255/180; violet 201/1/201; cyan 5/204/246; blue 0/0/255; yellow 246/232/5; lime-yellow 219/244/8)