NOMO

oh, that's chromatic aberration! i guess you could say its a kind of colour/visual distortion.

it's pretty simple to do, but i usually just use a csp auto action to do it for me to make things go quicker, but i can teach you how to do it manually in most programs.

i'm going to use this silly doodle of me as pompompurin as an example lol

youre gonna wanna merge everything onto a single separate layer first and then we're gonna work with that merged layer. make two copies of that merged layer so you have three of them in total.

the top merged layer will be our red layer, so youre going to want to got to EDIT > Tonal Correction > Level Correction

the level correction graph will pop up. since the top layer will be our red one, select the green level and drag the rightmost arrow on the Output scale all the way to the leftmost side. do the same for the blue level.

the image should be red like this afterwards.

the middle layer is going to be our blue layer so do the same thing we did for the top layer except youre going to reduce the green and red levels instead, and the middle layer should be all blue like this.

for the bottom layer, it will be our green layer. same process as before, reduce the red and blue levels so its all green.

your layers should be looking like this now

from here, you want to set the layer modes of the red and blue layers to Screen, DON'T do the same for the bottom green layer though. you'll notice once you've done that, the image will look normal again!

from here, all you need to do is shift the red layer in one direction, and the blue layer in another, to as much of an extent you want. the further they are from each other, the more drastic the effect will be

and that's how you do it! my other personal tip would be to add a layer of noise set to Overlay or Soft Light at a lowered opacity over the drawing bc it goes well with the aberration, or even sharpen the image.

if you dont want to do all that hard work though and you happen to have clip studio paint, just use an auto action, like this one!:

https://assets.clip-studio.com/en-us/detail?id=1713222

hello! this is a bit of a hard question to answer since i dont think giving a tutorial of how i colour without learning any foundational colour concepts first would be very beneficial, so i'll try to give you some basic tips on picking colours instead since this is a very VERY expansive topic and im simply not the kind of person that can pass on that knowledge very well especially since im not the best at it lol

when im picking colours for my drawings, i try my best to "unify" the colour pallet so that it seems more cohesive, this tip from ggdg sums it up pretty well i think

other than that, i usually try to pick colours that generally look good together based on different colour harmony concepts, like these!

i'll try and show you an example with something i'm working on right now. you'll notice i didn't colour pick tinkaton's colours from its art and went for a warmer pink and saturated the blues of the hammer a little.

you'll also notice the canvases i draw on are NEVER pure white. this isnt to say pure white is something that can never be used but white is a colour that usually influenced by surrounding colours, so pure white in most pallets just wont look right. so its not usually a colour i would use as a backdrop if youre trying to pick good colours for your art. but again, there's always exceptions and this isnt a hard rule. here's pure white compared to the colour my canvases usually start with

another thing i should touch on briefly is colour relativity and the importance of value and saturation.

value is SUPER SUPER important for making sure all the colours in your art stand out from each other and read clearly. as you can see here, most of the values here stand apart from each other, and i can see that i probably need to adjust the darkness of the light blue in comparison to the pink hair tips, though the lineart separates them well enough already i think. this is also a good way tocheck you havent made any dark skinned characters too light. values are important guys!

hot tip: put a layer of pure black on top of your art and set that layer to "colour" and BOOM! you can see the values of your art in grayscale.

and i'll also briefly touch on colour relativity. because we percieve colours relative to each other, we usually read a colour as something its not when its surrounded by certain other colours. let's take a look at my background drawings in the cover i did for the shuichi saihara zine:

though i only used a bunch of different purples, when all of them are perceived in relation to each other, a warmer purple can look like blonde hair amongst all the other purples!

as for the brushes i use while colouring, i like textured brushes! i bought these so i cant share them for free but im sure there are many free alternatives out there

anyway, sorry if this isnt exactly what you wanted, but there are TONS of people out there that have worded this better than i ever could, i would suggest looking up some youtube vids on colour theory, but i hope these little tips are useful enough!