LEGO® colour 154 has had a bit of a bumpy history, and it seems it might not be over yet... now Sven Franic has noted a change for 2019, and is wondering what's going on! [Editors note: This article has been updated to incorporate The LEGO Group's comments on changes to Dark Red in late 2018.]
Somewhere around 2009 - 2010 there was a secret switch from “old” Dark Red to New Dark Red. During the transition period, when 10182 Café Corner was still occupying store shelves, you might apparently get a mixed batch of old and new Dark Red pieces in the same set. Judging by the backlash of the AFOL community after the big 2004 colour changes (when TLG transitioned from BASF’s pre-coloured ABS pellets to in-house pigment mixing) it is not surprising they would avoid attracting attention to subtle changes in the tone and texture of elements if it was not clearly noticeable or did not affect the build experience. BrickLink never differentiated between the two shades of Dark Red – and neither did TLG externally. Internally they retained its colour ID – 154 – although they changed its name from Dark Red to New Dark Red.