Here to clear up the confusion about choosing paint colors! 😊
And this is from someone who got tired and frustrated with repainting, too! 😕
Light is everything when it comes to seeing true color and undertones, but the biggest piece with interior design is what the colors are referring to in the room.
The light shines equally, morning, noon, and evening, on those same materials. And the same at night with the artificial lighting. I prefer the range of 2800 Kelvin of incandescent bulbs to the 3000 Kelvin of halogen bulbs.
You need to analyze the undertones 🎨  of all the permanent materials in the room, like flooring, millwork, and built-in cabinets (anything you can't paint out). And then analyze the undertones of the larger furnishings that you don't have the budget to change, like sofas, loveseats, casegoods, etc.
You need to choose 2 undertones max per room, or you're really going to detect the disharmony. Unless you are an Interior Designer with ninja-like decorating skills to distract the eye from the mismatch and mistakes, don't go there... EDIT! It helps to have an area rug that has the 2 undertones and an accent color that you are using in the room to tie them together.
Then choose paint last! Make sure it has the undertone of the largest quantity of colors in the room.
🌟  The paint must reference the materials in the room! 🌟
I learned this from Maria Killam, a color expert in Vancouver. She trains interior designers and homeowners. She has a color wheel for analyzing the 9 major neutral undertones and 4 major whites in paint and accessories. This was a game changer! What you need is a good system for analysis! That takes away all of the confusion, no mistakes, no guessing, no blaming the light! 😂
My training comes from personal color analysis. The skin is the material that we are working with. And while hair color is your biggest accessory (it's like the sofa in the room), it must reference the undertones in the skin, which you can't change. The best system I've found so far is Kathryn Kalize's Sci-Art 12-season color analysis system.
The color analysis system you use must work in every situation. If your system isn't working, it is not complete.
Hope this helps! Happy painting only once, and getting it right the first time! 😅 😊
Fifi your home is lovely!  With all those competing undertones in your kitchen and living room. You are a ninja!  🥷 ❤

I discovered the same trick when choosing paint colors for several homes over the years.  The light orientation, reflections from exterior surfaces or foliage that can tint the incoming light, and dominant palettes in exterior views changes the way your eye perceives light.  In smaller rooms, I consider how light reflecting off painted surfaces affects the occupants' complexion.  I now choose paint colors like a photographer, to "correct" ambient light, not just create a particular design palette.

Ah, James White by Farrow and Ball. I loved it on the card, loved it in the sample tin, loved the patch I painted on the wall, but hate the whole room/ceiling painted in it. I looks pale yellow, my least favourite  colour :) Great video, thank you!!

Side by side comparisons of before and after are much more easily comprehensive than a one second flash of each one after the other where you can't even compare the differences.

Beata Heuman (whose own fun London home is filled with tons of character and patterns) advises to just pick a white or off-white and don't stress about the undertones because the room will be filled with furniture and decor anyway. I personally love Hague Blue from Farrow and Ball but in very small doses. Color drenched rooms are a trend I just can't get behind.

My regret is the trim on our house.  In 2018 we had a horrific hail storm and we had to have our roof and gutters replaced, luckily we have stucco so we didn’t have any damage there.  It’s the only paint we’ve done in the 20 years we’ve lived here because I’m even more terrified of choosing paint than I was before.  We’ve lived with the cream paint that the builders used.  
We live in Colorado USA and the ocean feeds my soul but we are completely landlocked.  I want my home to feel like the ocean and my favorite color is aqua, I wanted something like that but softer.  Explaining it to the clerk at the paint store they convinced us to go with a more bold color and I’ve hated it since the first stroke of the brush.  
I’m ready to try some color on the walls so I’ve been watching videos and I asked chat GPT and it suggested sherwin Williams Sea Salt or Benjamin Moore Wythe Blue.  I’ll have to get samples and paint different areas because we have open concept with vaulted ceilings. Our main area faces west so lots of afternoon sun.  I just need to get the courage up and get it done.  Thanks for sharing.

Five years ago I too fell victim to Pinterest. I bought a patterned merola tile for my small bathroom floor and decided to paint the walls to match one of the patterns colors. I chose midnight bayou. Its a very beautiful color and I kept seeing it's ok to paint a small bathroom a dark color. The man at the hardware store told me everyone was currently obsessed with the color graphite. Its black. I couldn't paint a room black. It would freak me out to go in there. But the dark blue turned out to be very impractical in a bathroom. It was dark in there, but what was worse was water spots and streaks left on the paint from shower steam. Small bathrooms do  get steamy. I was constantly touching up the paint in there because it got streaky if you cleaned the walls. Its currently being repainted white. I do like dark colors, but I think you can get sick of them too. Definitely don't choose a very dark color in a bathroom. If you give a dog a bath or have kids or a husband who gets water on the wall its a nightmare to keep clean. And it does feel cavelike in there as well.

For years I have wanted to paint either my office or my foyer at least partially in Vardo by Farrow and Ball. I have various lighter shades of green-blue in other rooms (including F&B Green Blue) so it would be cohesive, and in my entry it would certainly make a statement. But my VIctorian terrace foyer is narrow and only has a transom for natural light, so I am scared it will be way too dark even if I keep the woodwork light and bright. Same with the office -- it's a long narrow room with the window at one end, and such a dark colour would really damp the reflections which currently (as the walls are white) mean it doesn't feel dark. But I really love that colour and I think I'd feel joy seeing it every time I come home. Still torn! ... but perhaps I should just go for it and, if it doesn't work, convince myself that at least I learned a lot 😅

Thank you Fi. This is an excellent video because it’s very informative and helpful. You’ve made something that can be quite confusing and complicated easier to grasp. 😊

My biggest paint surprise has been Dulux Just Walnut. I tested it all over and thought I'd found the perfect warm neutral to lighten up my dark back bedroom, and it turned out pink! Luckily I can live with it, but it's definitely not what I thought I was getting. Now I'm watching your video's to educate myself so I don't make the same mistake again 😊

Hi ,  I really want to paint my utility/shower room a dark blue,  it north facing but want to try something dramatic,  any recommendations?  Don’t want it to feel cold.  Love watching your videos.

i love that yellow on the door

My apartment is very warm in the mornings: west-facing mostly. Which colors do you recommend? I want a calm, peaceful feeling. I gravitate towards sage

LOVE that yellow door!

Really supportive advice. You do learn from mistakes, very true. I painted exterior of house in lime white, thinking it would be great in countryside surroundings. It picked up all the green of the surrounding trees and gave off a really cool vibe which was a surprise, not a good one. Changed it to Joas white with dimity windows and the warmth gave the balance. 😉🌸🌸🌸

Thank you for this. We are renovating a house and though I won’t be using these particular paint brands (we are in the US), I can easily apply the same concepts that you explained so well.

Your house is lovely Fi and you've got such a nice down to earth way about you on your videos that make them so easy to listen to and you give great advice. Thank you

That was really timely and useful 🎨👏🏽🏡

I started to paint my hall mustard but stopped and changed it to Benjamin Moore’s Rich Cream which looked good in my TV room.

My favourite white/neutral is Little Greene’s ‘Linen Wash’. It works both in north and south facing rooms and in various lights too. I tried soooo many neutrals but they were too yellow, too grey, but LW is like baby bear’s porridge!

I loved LW so much inside, that we also used it on the windows outside, and I’ve had people knocking on my door asking what colour I’ve painted them! Yep, you can’t go wrong with it.

We have Farrow and Ball’s ‘Treron’ on our front door. The frame is painted the same and it works brilliantly against the orange brickwork. Yes, you are right, colours outside seemed washed out. Beware Treron…I’ve spotted a lady taking photos of our front door! I’ll take it as a compliment rather than think we’re being watched!