Coleus tend to change color according to the amount of sun they receive, I recommend putting it into the brightest window you have unless this window gets burning hot sun.....

In your climate I would plant it outdoors in the ground if you can. Coleus can grow into large bushes in the tropics.

Thanks guys. We dont really have any space for outdoor gardening in the capital. =(

Hi
Really tough to give advice for your climate but since you're growing as a "Houseplant" Coleus is VERY hardy and adaptable only thing they will not tolerate is cold and drying out . I'd keep it in shade until it starts to grow and then decide how you want to maintain it. IN tropical climes
some varieties will become trees but very easily pruned into whatever . Be sure to keep it warm and well watered
The prunings will also become new plants very easily just stick in water or a bit of soil with or without hormone
In a week or so you have a new plant lol
I use them extensively outdoors because they come in a gazillion colors and forms and you only have to buy one plant lol Excellent choice for a new addict ?? lol gary

It looks like Perilla 'Magilla.' Botanists aren't sure if it's a Coleus or not. (Like Coleus, a hearty plant, not hardy. Can't survive frost.)

If you are growing inside, turn your plant often so it stays well-rounded.