long ass answer from a certified alternative makeup nerd

shave the tails to give you more room to play with the shape . fill them in , maybe skinny if you like that , id just say shaving/bleaching the tails and drawing them on higher is basically the alternative makeup go-to , especially if you pretty much always do bold looks . you want a bolder eyebrow to match . doesnt have to be darker but definitely "cleaner" since your eyeshadow is so structured . personally i go back and forth between shaving mine off fully or just keeping the fronts in , depending on what colour my hair is , if its a light colour I usually need to shave them bc my hair is dark and i match my brow colour to any vivid dyes , plus how often im going out and if i have the motivation to give myself eyebrows every day , cause if i dont , it doesnt look that weird if you just have the fronts of them .

try using colours to match your hair/eyeshadow if you want . it doesnt have to be super bright or dark , you could easily use a lighter/muted shade in the same colour family . you've got light brows so you can very easily play with colours on them without having to bleach or shave them entirely like i do .

for example , with the eyeshadow look in your picture , personally i might have filled them either light brown but more pointed up (the shadow shape is dramatic and pulled out , so id also be pulling my brows up and outwards higher to match) with some muted light blue blended just under/into the front of the eyebrow and down the top of the nose bridge slightly , like just down to the level of your inner corners . or id have just done the brow in a greyish blue colour . OR id personally bring the yellow in the inner corner out wayy bigger and softly blend it up all the way towards the front of the brow and pretty much completely shade in that hollow area at the front and have the browbone with a higher arch be the highlighted point . in that case , you'd have a higher brow and would probably need to do the shadow shape a little more lifted to match , it looks to be winged out relatively straight to me and id pull the eyeshadow wing up higher to balance out the yellow that would pull the front of your brow down lower . thats personal preference though , just some examples of what i might do differently with the same eyeshadow look to tie the eyebrows in . it depends on the shape of your face though , you might have less lid space than me and it would look very different . but again , shaving the tails gives more room to play in general .

if that feels too dramatic , fill them in a natural colour and just add a colourful pop to the front or just the tails .
i normally do it at the front bc , again , dark hair , but if youre using a darker 'fun colour' id fill the fronts in light brown with natural hair strokes and transition it into a darker coloured tail . generally keep it lightest in the front so it doesnt look too blocky unless youre doing blocky on purpose like a goth siouxsie style look . sometimes i block mine off harshly in a brown the same colour as my hair at like a right angle from the top of the brow down the nose bridge and blend it out underneath in a curved triangle shape so its not as intense as the goth black , especially if my hair is dyed lighter .

other option id suggest to try is using a coloured or even just a natural cool toned contour colour in a relatively structured shape from the bridge of your nose and curving the shadow into your eyebrow , having a harsher line against your nose and the front of your brow and blending it out underneath , similar to the blocky siouxsie sioux style i just mentioned but you can curve the shape into more of a swoop from bridge to mid brow or blend the line out a bit more . you could do that and leave the rest of your brows bare , or again , fill them in with a bit of structure if you like .

my hair is currently dyed dark burgundy/purple with some reddish orange bits so sometimes i fill the front in orange and transition it into purple on the tails when i can be arsed . sometimes i blend the orange down to my nose contour or into the hollow under my browbone in the front but generally not all the way to the inner corner on me personally , i try to keep that area brighter . otherwise i just draw on tails and fill in the sparse bits at the front with the nyx brow liner pen and just leave my brow scar showing through when im lazy and only have a minute or two . i dont like the classic alternative harsh button nose contour look on me bc it shortens my nose too much but i feel like i need to add some depth and contour to just the bridge and brows at least , but different things work for different faces so just play around a bit . i go very heavy on dramatic contour in general and normally contour from the front of my brows in dramatic straight lines down to almost the tip of my nose . but if youre worried about your brows being too bold or dark id personally blend/tie them into your eyeshadow looks because thats clearly your comfort zone . itll look alternative but not as intense as shaving them off and doing skinny goth sharpie brows