New graphic to signal whether fire will be extinguished in the following turn
Similar to how obstruction's # will turn black when it'll dissolve the following turn, to give the player more information, fire could turn a darker hue (as bright yellow is already used for explosions) to indicate the same. This would benefit the player's general navigation of burnt patches of grass, especially as part of the keyroom, giving more tactical depth. It would also be clearly displayed whenever the player uses a staff of firebolt on a bloat, as the fire created as a result will always turn to sputtering embers on the next turn. Quite minor, but I think it would be an improvement.
Personally, I'm not sure it justifies a change. The information gained seems very minor and it would make fire look darker overall
I think its effect would be considerable for navigating brimstone, burning grass keyholders, and large fires generally, but maybe it would make them too traversable. Alternatively, if dark fire isn't wanted, the color could be bright white (the incendiary dart already produces this effect when thrown onto grass).