Currently some astronomical bodies, such as stars and planets, have a green / bright green line around them to notify players how far they can go without being pulled out of supercruise. I understand the colour has been chosen to contrast well with colours typical for the stars (yellow, orange, red, blue). However, this colour is not the best choice to signify danger of any sort and I would suggest replacing it with bright red / electric red as it wouldn't be any less visible to the players whilst at the same time would be clearly perceived, especially by the new players, as something to notify them of danger.