I am new to openGL and wanted to set the text color tried the glColor3f function but it changes the drawing color as i only want to change the text color what should i do?
You could push the current colour onto the attribute stack, change the colour, draw the text, and then pop the stack to restore the original colour:
glPushAttrib(GL_CURRENT_BIT);
glColor3f(...);
// Draw your text
glPopAttrib(); // This sets the colour back to its original value