Client comes to me.

Client: So my business is colour matching, people visit me and I help match outfits they should wear that works with their hair and eye colour etc.

Me: Ok... and?

Client: Well. I'd like to do this online, someone sends a photo in and I assess it and send them a colour palette back.

Me: Right... How are you going to calibrate this?

Client: What do you mean?

Me: Well, it's a nigh on impossible task to ensure the exact tones and hues they send you in their photo to what you see, and likewise what you send back might look very different based on their brightness and contrast. Colour science is actually quite hard.

Client: But I don't understand they just send a picture right?

Me: Yeah, they can send one, but are you going to have a consistent baseline for your laptop, can you guarantee the brightness is at the same level each and every time?

Client: No... Why would that matter?

Me: I'm bored now, I'm not gonna take this project.