there are many ways to get the same results and i'll use various methods usually just based on what i'm feeling at the moment. some of it is a little convoluted, but hopefully this will give you a rounded idea of how it all works so you feel more comfortable playing around with your own colouring

NADJA

this is the base gif with zero colouring adjustments, just resized and sharpened.

unless the base gif is already very bright, which doesn't often happen because directors nowadays are allergic to light, the first layer i add is always a brightness/contrast layer. i don't adjust any of the sliders, i just change the blending mode to "screen", and then adjust the opacity if needed. this gif was pretty dark, so i left it at 100%,

my next layers are always curves to even out the white and blacks. i use two curves layers, one for white and one for black. i used the white drop-picker and selected just below the lightshade on the lamp behind her, and for the black drop-picker i selected her hair near her neck which gives us this

it's already looking much better, it's not as green tinted, but i want to make the red of her dress pop a bit more. in order to do that without making her face too red, i'm gonna remove some of the yellow. so next i'm gonna add a selective colour layer, and under the yellow channel i moved the yellow slider to -5 and the black slider to -52. now

now that the yellow is reduced, i add another selective layer, and under the red i move the cyan slider to -66 and the black slider to +29. now the red of her dress pops and her face is still a realistic tone. when i first made the gif, i added the red selective layer first, then added another selective layer under it and adjusted the yellows to offset it. you can always shift layers around or add a new layer underneath as you go.

voila

TOMMY

here is our base gif

this scene is better lit than the nadja one, but i prefer bright and colourful gifs, so i'm gonna once again add a brightness/contrast level and keep it at 100%

and then the curves layers to even it all out. since there isn't a spot that is immediately noticeable as white, you can hold the alt button with the white dropper selected and it will highlight all the white/very near white pixels. you can also zoom real close in to select specific pixels. i selected a from the white area around his chin/mouth. the same process works for finding a black spot with the black dropper, and for that i selected from a dark spot in his hair

the curves layers evened it out but also made the gif a bit more red and warm toned, and since i've decided i want the end result to be more blue/green, so i'm gonna add a colour balance layer. in the shadows channel i moved the cyan/red slider to -16, and the yellow/blue slider to +11

now the gif already looks great, it's bright, skin tone is accurate, he's not washed out, but like i said i like my gifs colourful, so i'm gonna add two more selective colour layers. in the first i'm gonna adjust the greens, bringing the magenta slider to -87, and the black slider to +81. in the second layer i'm gonna adjust both the blues and cyans, because when you see blue in a gif it's rarely ever straight blue or straight cyan, so always adjust both. (you could adjust the blue and green in the same layer, but i prefer to do them separately in case i need to move the layers around)

now finally i'm gonna add a hue/saturation layer because i think the blue of his suit is too blue when the sky behind him is more cyan. (also, since you only have 256 different colours to work with, you don't want too many different colours otherwise it will distort the colouring.) in the blue channel i move the hue slider to -12 to make the blue a bit more cyan, and i also move the saturation to +38 to make it pop more

and voila

RHAENYRA

here is the base gif (this one is going to get very convoluted and imo best exemplifies what colouring gifs is like most of the time)

as always, a brightening layer set to screen

now the curves layers. for the white i clicked on her hair at the top of her head, and for the black i i clicked in the shadows to the left of her.

but as you can see, while it added contrast, it also made the gif more green tinted than it was. you could click around more, or manually adjust the red, green, and blue lines on the curves until it looks better but i decided to add a channel mixer layer instead. in the green channel i set the greens to -95, and in the blue channel i set the blue to -97

next i wanted to add a little contrast, but i find that using the contrast in brightness/contrast can saturate it too much, so instead i added a levels layer. first i adjusted the bottom bar, moving the right slider to 230 which reduces the overall brightness of the gif, so when i adjust the top bar it doesn't brighten the gif too much. on the top bar, i moved the right slider to 212, and the left slider to 9

now, i'd like it to be not exactly warm toned, but less cool, and while i could use colour balance or a photo filter, i'm instead going to add a gradient map, using the default gradient pink 08, and setting it to blend mode soft light at 50% opacity

next i just want to increase the blacks a little, so i'm gonna add a selective colour layer and under black i'm gonna set the black slider to +10

it's still not as warm as i'd like, so i'm gonna add a colour balance layer, in the midtones setting the cyan/red to +10 and the yellow/blue to -5

we're almost done, but i want to make her dress pop a bit more, so first i'm gonna add another selective colour to bring the yellows down a bit, setting the black slider to -15

and finally one more selective colour layer, in the reds, setting the cyan slider to -50, the yellow slider to +10, and the black slider to +15

voila

NATALIE

here's the base gif

as always the brightness/contrast layer set the screen

now the curves layer. for the white, i zoomed in and selected a pixel on her cheek under her right eye. for the black i the dark spot just above her head

now she's very yellow, so i added a channel mixer layer. in the red channel i set the reds to +88. in the blue channel i set the reds to +10

she's still a little too yellow for my liking, so i'm gonna add a hue/saturation layer, and under the yellows i'm gonna adjust the saturation to -60

finally, i want her to be a it brighter, so i'm gonna add another curves layer, but instead of using the drop, i'm going to manually adjust it. the two points along the line are where i selected it and then i dragged until it looked how i wanted. i start with the upper dot, which made it brighter and moved the line into an arch, and then selected at the lower end of the line and dragged in back closer to centre to add some darkness and contrast

voila

and that's how i do my colouring. it's generally all trial and error, using a layer to fix one thing and then needing another layer to fix something the previous layer did.

play around, have fun, see what works for you and what doesn't. it will take a while for you to develop your own method and style, and even then you'll come across scenes that make you question if you have any sills at all. you do, directors just hate us