If you're in the market for a fuss-free blue eyeliner, this bright number from M.A.C is an easy way to switch things up without overcomplicating your routine. The gel pencil glides on smoothly and gives you a little time to play with the shape before it sets. The colour is richly pigmented and wears well through the day without needing touch-ups. Use it to smudge a wash of colour across your lids, line your waterline for a kohl-rimmed effect, or build it up into a graphic flick if you're leaning into the full Y2K mood. It's versatile enough to work however you want to wear it.

For those who like to get precise and artsy with their eyeliner, this vivid blue liquid liner from KIKO Milano is a solid pick. The formula has a fluid, almost inky texture that deposits strong colour in a single clean stroke — ideal for crisp wings and graphic lines. The applicator offers noticeably more control than a typical liquid liner, which makes a real difference when you're working on looks that need a bit of symmetry and detail. The finish is smooth, slightly glossy, and dries quickly, so the colour sits boldly on the lid without any fuss.

Not quite everyday, not quite over the top — this metallic blue liner from Lancôme sits in that sweet spot that's easy to underestimate. The soft foam felt tip gives you a clean, controlled line whether you're mapping out a wing or tracing close to the lash line, with none of the usual back-and-forth. What makes it special is the finish. It leaves behind a light-catching blue that shifts subtly as you move, adding a quiet dimension to the eye without needing anything else on the lid.

Sitting somewhere between a classic blue and a bright pop, this turquoise liner from L'Oréal Paris is a fun take on the Y2K eye look. The automatic gel formula has a smooth, almost velvety glide that makes it easy to work along the lash line or layer up colour without any tugging or dragging. It also comes with a built-in smudger, so you can blur the edges into a softer, smokier finish straight away without needing a separate brush.

If you want something that stands out from the usual range of blue liners, this one is worth a look. Maybelline's liner in the shade 'Ride' is a gorgeous sky blue, and thanks to its hyper-condensed carbon pigments, the colour comes through deep and saturated in a single pass — no layering required. The nylon felt tip keeps application easy and clean. It's also waterproof and smudgeproof, which makes it a reliable everyday option even beyond a Y2K-inspired look.

A darker, more refined take on blue, this marine liner from YSL is the kind that pairs just as easily with a minimal look as it does with something more high-glam. The pigment is rich and saturated, and the pencil glides on without any effort. The built-in slanted brush is a thoughtful touch — it lets you soften and diffuse the edges right away without reaching for extra tools. Whether you want a smoked-out liner or something more sculpted and elongated, this one handles both with ease.

This one is extremely Y2K-coded, and we're completely here for it. The holographic peacock-inspired blue is packed with fine shimmer, giving it a multi-dimensional, almost reflective quality that shifts as the light catches it. It applies smoothly and lays down a glitter-rich line without feeling chunky or overdone. Wear it as a sharp wing against bare lids for full impact, or layer it over a darker base to deepen the shine and add more dimension.