This is a much larger question concerning color management. As part of a color-managed workflow, you should calibrate and profile your laptop display, and then the color space utilized within Photoshop will depend greatly on how you intent the image(s) to be used. For example, an image on social media will generally have a different color space then something going to print.
Hi Pashan, Your macbook screen has its own ICC profile, as does any image you work on or create in Adobe apps like Photoshop -
As D. Fosse suggested, if you have no idea then sRGB is a good basic choice as a Photoshop working colour space. Some prefer Adobe RGB or a larger colour space, but if you make that choice you need to understand the implications.
I suggest you learn a little about ICC colour profiles, what they do and how they affect your work here:
I hope this helps thanks neil barstow, colourmanagement.net :: adobe forum volunteer [please do not use the reply button on a message within the thread, only use the blue reply button at the top of the page, this maintains the original thread title and chronological order of posts]