The color change happened when Notch was still coding and he switched the way day and night render. Day used to happen from sunrise to sunset(6am-6pm, i think) with specific light levels. As soon as the moon rose, the light levels would change to the new level range and you could watch the chunks turn dark one at a time. The transition was one of the worst sources of lag and fps drops in the early versions, just behind the Lag Spike of Death which is a whole different discussion.
The new lighting engine uses a sliding scale of lighting texture which moves from brighter, warmer colors during the day to darker, cooler colors at night. It helped most computers handle the transition from day to night, but it lowered fps on some machines due to the new way textures were handled. Smooth lighting was introduced around this time as well since the lighting textures were on that sliding scale, but I don't know that timeline for sure. Smooth lighting meant that very few blocks have full saturation.
Eventually, biome-specific coloring came along which ended the bright green colors for good.
See a difference? I cant tell whats different between these two styles? I know what it is, but i just CANT DESCRIBE IT!
Its graphics i know, but which part of the graphics? I JUST CANT DESCRIBE IT! Can you?
It is not even that, they have changed the color of everything to make it more "realistic" I guess... I kinda miss all of the old colors...
The new lighting engine uses a sliding scale of lighting texture which moves from brighter, warmer colors during the day to darker, cooler colors at night. It helped most computers handle the transition from day to night, but it lowered fps on some machines due to the new way textures were handled. Smooth lighting was introduced around this time as well since the lighting textures were on that sliding scale, but I don't know that timeline for sure. Smooth lighting meant that very few blocks have full saturation.
Eventually, biome-specific coloring came along which ended the bright green colors for good.