Sierra Blue Ultra Thin Case Review

Blue phone cases usually go one of two ways: too pale to notice or too bright to feel like anything but a phase. A Sierra Blue phone case sits in the middle, deep enough to look intentional without turning your phone into a statement piece you get tired of by next season.

Quick answer: The Sierra Blue Ultra Thin case pairs a rich, muted blue finish with Griplux's 3.5mm ultra thin build. It holds up well for everyday scuffs, keeps full MagSafe compatibility, and offers a distinct look within the Ultra Thin lineup. At $29.99, it is priced the same as every other color in the line, so a Sierra Blue phone case really comes down to whether the shade fits your style.

What Makes This Color Different

Sierra Blue is not a bright, primary blue. It leans closer to a dusty, denim-adjacent tone, and the muted finish tends to appear consistent under different lighting conditions rather than shifting dramatically between indoor and outdoor light. Compared to Griplux's neutral options like Solid Black or Frosted White, a Sierra Blue phone case gives you color without asking you to commit to something loud like Desert Gold or Deep Purple.

The Case Itself

The color sits on top of the same build as every other Ultra Thin case in the lineup, so you are not trading protection or fit for the shade you like.

• 3.5mm thick and 6 grams, keeping the phone's original shape intact

• Precision cutouts for ports, buttons, and the camera module

• Raised camera lip to keep the lens off flat surfaces

• Zero branding on the back

• Full MagSafe compatibility

• $29.99

What Customers Actually Say About This Color

Reviews on the Sierra Blue colorway are largely positive, with several buyers describing the shade as striking and the ultra-thin build as keeping the phone's sleek profile without adding bulk. A small number of reviewers noted the exact tone looked slightly different in person than expected from photos, though most still called it a solid choice overall. As with any color online, it is worth checking a few product photos taken in natural light before deciding if the shade matches what you have in mind.

A Quick Scenario

Picture pulling your phone out of your pocket at a coffee shop or during a work meeting. A Solid Black or Frosted White case blends in without anyone noticing. A Sierra Blue phone case gets a second glance without feeling like you are trying too hard, which is exactly the gap it is designed to fill between neutral and bold.

Sierra Blue vs the Other Ultra Thin Colors

Sierra Blue tends to sit between the neutral and bold ends of the lineup. Solid Black and Frosted White are the safest, most versatile choices if you want the case to blend in. Desert Gold and Deep Purple lean bolder and more attention-grabbing. Sierra Blue lands in between: noticeable without being the loudest option on the shelf, which is part of why it works well if you want personality without redesigning your entire look every time you check the time.

Pairing Sierra Blue With Other Accessories

Neutral accessories tend to pair naturally with a Sierra Blue phone case without competing with the color. A Black or White Luxi Snap Grip keeps the focus on the case rather than splitting attention between two shades. Since the case is fully MagSafe compatible, charging with the HyperGaN Charger or any MagSafe accessory works the same regardless of case color.

Who Should Choose a Sierra Blue Phone Case

• Anyone who wants color without going with something as bold as gold or purple

• Buyers who like a muted, denim-toned blue over a bright primary blue

• People who want a consistent look across different lighting conditions

• Anyone comparing colors within the Ultra Thin Case lineup, including the Solid Black Ultra Thin Case

Frequently Asked Questions

Does the Sierra Blue color fade over time? 

Based on customer feedback, the finish holds up well over several months of daily use without noticeable fading, though results can vary with heavy sun exposure or frequent handling.

Does the Sierra Blue phone case show fingerprints? 

Solid, matte-leaning colors like Sierra Blue tend to show fingerprints and smudges less than glossy or clear finishes, though light handling marks can still appear over time with heavy daily use.

Does this case cost more than other Ultra Thin colors? 

No. Every color in the Ultra Thin lineup, including Sierra Blue, is priced the same at $29.99.

How does Sierra Blue compare to Deep Purple in terms of popularity? 

Both are popular picks in the Ultra Thin line, though Sierra Blue tends to appeal to buyers wanting a more understated color, while Deep Purple leans bolder. Read our full Deep Purple Phone Case guide if you are deciding between the two.

Is the Sierra Blue Ultra Thin case the same build as other Griplux case lines? 

No. It shares its build with the rest of the Ultra Thin lineup specifically. For a comparison against Griplux's other case lines, see our full Ultra Thin Case Review.

Is a Sierra Blue Phone Case Worth It?

Note: the Ultra Thin build helps protect against everyday scratches and light drops, but no slim case can guarantee protection against every impact. If maximum drop protection matters more to you than slimness, a reinforced option like Griplux's Kevlar case is worth considering instead.

If you like the idea of a slim, minimal case but want a shade with a bit more personality than black or white, a Sierra Blue phone case is a strong pick within the Ultra Thin lineup. The build, protection, and price all match the rest of the line, so the decision comes down entirely to whether the color fits how you want your phone to look.

Check out the Sierra Blue Ultra Thin Case directly, or browse the full color lineup before deciding.