A little further research pointed me towards Bricklink's (now retired) "Light Pink". Which is a colour they later had to admit doesn't exist at all, but is just regular Pink in softer plastics (similar to "Rust"/Red).
To complicate things further, the ID formerly occupied by Light Pink was then given to the newly introduced "Rose Pink".
Which still leaves me to wonder what LDraw's 77 Light Pink actually is:
*TLG's 17 Rose
*TLG's 223 Light Pink (unreleased prototype colour meant to replace Salmon/Medium Red in 2004)
*Bricklink's 56 Light Pink (TLG's 09 Light Reddish Violet in PP/rubber/cloth parts)
The current colour value of 77 is kind of close to 17 Rose, but it could be a bit darker and with a slight yellowish tint:
And yes, the plate is not just discoloured, that difference is intentional.
To complicate things further, the ID formerly occupied by Light Pink was then given to the newly introduced "Rose Pink".
Which still leaves me to wonder what LDraw's 77 Light Pink actually is:
*TLG's 17 Rose
*TLG's 223 Light Pink (unreleased prototype colour meant to replace Salmon/Medium Red in 2004)
*Bricklink's 56 Light Pink (TLG's 09 Light Reddish Violet in PP/rubber/cloth parts)
The current colour value of 77 is kind of close to 17 Rose, but it could be a bit darker and with a slight yellowish tint:
And yes, the plate is not just discoloured, that difference is intentional.