If you are referring to their feathers getting darker or lighter as they mature then no. But in normal types of parakeets, such as the normal greens and blues, they have bars on their faces going down to their beaks that will vanish as they mature. If you are asking about their Cere (the fleshy part on their beak) It can be quite complicated. In MALE babies the cere will be a TRANSLUCENT pink with maybe some OPAQUE white around the nostrils. For FEMALES the cere will be mostly an OPAQUE white and maybe little blue. This is not always set in stone however. When they mature, males will have BLUE ceres and when it is breeding season they will turn an even darker blue. Keep in mind that this is for NORMAL parakeets; not lutinos or albinos. In normal female parakeets, the cere can range in colors. The femal's cere may be brown, white, pink, and various shades inbetween. When a female enters breeding season their cere will get a crusty look and will be a dark brown. After breeding season has passed the cere crust will fall off.
I have seen them lighten, or darken, in color, as they grow. But, never change color.......Chuck.
they normally become lighter
Most baby birds ceres will be light coloured and darken as they age and mature.
When they are born they are lighter and then their skin starts to darken.
They fade over time
Well,...in the Wizard of Oz they do...! Real paint horses may darken in the winter then shed back out to their original lighter color in the spring.
Yes, if you try to darken your hair, the highlights will darken as well, but will appear lighter than the rest of the hair.
Most geckos are nocturnal. So, during the day, most tend to darken their color. Some geckos, like the Crested Gecko, has a brighter more beautiful color at night.
you add a colour that will darken it ex: black, borwn, dark red hope that helps
Technically, there are an infinite amount of colors - whatever you do, there will always be another shade you can blend in with this color, or another color with this shade. You can darken colors, lighten them, make them shiny, make them dull. There are any number of colors that you can think of!
no but it may wear and become lighter
There are various food and environmental factors (especially stress) that can affect eye color and make it "change" colors. I was born with sky blue eyes and as I got into my teenage years, they began to darken a bit and go to the point where they even change colors depending on what kind of light I'm in (Sunlight, room light, darker room colors, etc.) and the mood I'm in.