Blue 10 vs Blue 20: How to Choose Your Blue Paint Depth

Quick answer

Choose Blue 10 if you want a soft, dusky powder blue that keeps a room light and serene; choose Blue 20 if you want a dark, deep blue that adds depth to walls, woodwork, or a feature area.

The trade-off between light and deep blue

Blue 10 sits at the light end: its early-evening sky tone stays soft and serene while still having depth, so it reads as colour without dominating a space. Blue 20 is deliberately dark, which makes it a stronger statement but also means it absorbs more light and can make a small or north-facing room feel enclosed.

In practice, the lighter shade is more forgiving if you are painting a whole room for the first time, while the darker shade rewards a more deliberate approach—usually one wall, the woodwork, or a feature area rather than every surface.

Finish and size choices differ

Blue 20 gives you three finish options (Ultra Flat Matt, Matt, and Eggshell) and two size choices (2.5L can or sample pot), so you can match the sheen to the surface and test the colour before committing. Blue 10 lists finish, size, and location as available options, but the supplied catalogue does not name the specific finishes or sizes—check the product page for those details before ordering.

If you are painting woodwork or a high-traffic area, the eggshell option on Blue 20 is the more practical choice; for walls where you want a flat, imperfection-free look, the matt or ultra flat matt finishes are the ones to compare.

Where each depth works best

Blue 10's powder blue coverage suits bedrooms, living rooms, and any space where you want a calm backdrop that still has a hint of colour. Blue 20's dark tone is better suited to feature walls, alcoves, or woodwork where you want contrast and depth rather than an all-over wash.

A common mistake is assuming a dark blue will look the same on a large wall as it does on a sample pot. With Blue 20, the sample pot option lets you check how the dark tone behaves in your room's light before you buy the 2.5L can.

Decision rules for choosing your blue

• If you want a light, serene room: Choose Blue 10 when you want a soft powder blue that keeps the space feeling open and calm, especially for bedrooms and living rooms.
• If you want depth and contrast: Choose Blue 20 when you want a dark blue that adds depth to a feature wall, alcove, or woodwork, and you are prepared to test it with a sample pot first. Dark blues look darker on large walls—always test with a sample pot.
• If you need a specific finish: Blue 20 lists Ultra Flat Matt, Matt, and Eggshell; Blue 10's specific finishes are not named in the supplied details, so check the product page if sheen matters to you.

Product facts

• Blue 10: Soft, dusky powder blue with a crisp matt finish for imperfection-free coverage. The light tone and matt finish keep a room calm and hide minor wall imperfections, making it a low-risk choice for a full room.

  

• Blue 20: Dark-toned blue for interior use, available in Ultra Flat Matt, Matt, and Eggshell finishes and a 2.5L can or sample pot. The finish and sample options let you test the deep colour and choose the right sheen for walls, woodwork, or feature areas before committing.

  

Which blue is right for you?

Best for

• Anyone painting a whole bedroom or living room who wants a soft, calm blue
• First-time painters who want a forgiving, light shade
• Spaces that need to feel brighter and more open

Not for

• Rooms where you want a dramatic, dark feature wall—choose Blue 20 instead
• Woodwork or high-traffic areas where you want an eggshell finish—Blue 20 offers that option