Should toilet tiles follow the colour of the zone?
They can follow the zone colour, but white or grey cause no problem in a toilet in any zone, because the toilet is represented by Shani and Rahu and here the planet is given more importance than the zone.
Related questions
Can a bedroom be made at Shikhi (E1), and why should it be white rather than red?
Yes, a bedroom at Shikhi can suit elderly people, and it should be painted white rather than the zone's red colour, as advised for people of kapha nature and for those of pitta nature whose heat rises quickly. Shikhi is highly sensitive and already hot, so red would add heat and open the third eye.
Can a false ceiling be painted blue, and will it cause problems?
Light sky blue that matches the colour of the sky can be used and causes no problem. If the blue is dark, paint small twinkling stars on it to nullify its effect.
Can blue be used in the North-West?
Light green or a shining lustre white is better than blue in the North-West.
Can the kitchen platform be painted?
Yes, the platform can be painted, but the type of paint matters, which is explained in the topic of paints, pigments and colours. Never use oil-based paint.
How can I choose the colour that awakens my fortune for my bedroom if I have no horoscope or cannot read it?
Take a colour catalogue and turn its pages with your own eyes: the colours you are drawn to are the ones that awaken your fortune. Use that colour along with the colour of the zone you sleep in, and if possible match it with your horoscope; it usually matches. Sleeping steadily for eight hours in that colour lets its planet act on the whole body.
If Mars as the 10th lord (karmesh) is debilitated, should red be avoided in the logo?
Yes. A debilitated karmesh does not support you, so avoid its colour in the business and the logo, and take the colour of the 11th lord (labhesh) instead.