Not much you can do about the smart phone but for the laptop and the monitor I'd suggest a calibration tool like the Datacolor Spyder.
There are many more expensive and a couple are cheaper but for general use the Spyder does a decent job.

I looked at those, but I was unable to find any secondhand in my area. I'll keep my eyes open on craigslist for one, though!

See if you can find a Pro 4 cheap on eBay, no need for the latest and greatest.

Possibly solved by now, but even if they're all LCD screens, it's still very possible that you won't be able to get them to truly match. I'm no expert on display devices, but I do know that there's a few types of LCD screens out there. Not all LCD screens were made equal.

IPS panels are king right now for color accuracy, but usually cost more and will have the backlight show through some for pure blacks. Unless you get a shitty IPS monitor or really need that accuracy with super dark colors, the backlight glow won't be an issue at all. Like a phone, these don't really care what angle you try to view it from.

What seems most common nowadays is TN film, and while those tend to be cheaper, they also have less accurate colors. TN film monitors don't like it when you try looking at them from odd angles.

I know there's some older LCD types like TFT, but those aren't going to be as good as even TN film. They'll probably have the same viewing angle problems that you'll find in TN film.



I've got a dual monitor setup with a nice IPS screen as my main, and a cheapo TN film. If I slouch too much in my chair, colors on the TN film one get really wonky. This probably won't be as easy for you, but what I did was since I knew my IPS monitor already came properly calibrated, I just worked off that. I shat out a colorful blob in PS, then split the image between my two monitors. I fiddled with the display settings manually on the cheap monitor until I couldn't get the colors any closer. Took a while, but I got it done.

I used to have a TFT as my old secondary with the cheapo TN film as my main, and even then, the color difference between the two was pretty obvious. I had tried my best to get them to look alike, but a shit screen can only be so good. It's not as glaring with my new setup, but there's still certainly a difference between the two for me.

Like the dude above said, getting the phone right will probably be tough, so I'd just got for working on the monitor and laptop. I would personally just mimic what I did. If you google the laptop and monitor model numbers, I'm sure you could find out about how good they are, then keep that in mind as you're fiddling with things. I don't know how familiar you are on the subject, but I could try helping you if you need it. Of course, I can't see what your monitors actually look like, so it would really boil down to putting the specs into layman's terms.


You know it's time for bed when you start shitting out essays randomly and the clock says it's after 3am



TL;DR
I would suggest just eyeballing it and manually adjusting your laptop and monitor display settings and leave your phone alone. Even if they're all LCD, screen quality still plays a huge role and probably will stop you from getting them all looking the exact same.

All perfectly valid advice! My current thought is to invest in an IPS monitor once I'm financially able to do so.
The cost could be justified for when I'm doing professional work (I work for my father's signage company). However, all of my personal hardware is second-hand or free. Thanks for the great advice, though!