That’s Not the Colour I Picked! A Modeller’s Complete Guide to Paint, Perception, and Getting it Right

We’ve all been there. You’ve spent ages scrolling through websites, holding paint pots up to the light, and comparing charts to find the perfect shade of Olive Drab for your new Sherman tank. You finally get the airbrush out, lay down a beautiful, smooth coat and… it just looks wrong. It’s too dark, too green, or just doesn’t have that something you were picturing.

You’re not going crazy, and it’s probably not a bad batch of paint. The truth is, the colour you see in the pot is rarely the colour you get on the model. Welcome to the weird and wonderful world of colour perception, where what you see isn’t always what you get. But don’t worry! Once you understand the little tricks that light, scale, and even your own brain play on you, you can take control and get the results you want.

This is more than just a quick tip list; it’s a deep dive into the ‘why’. Understanding these principles will change how you approach painting forever.

The Incredible Shrinking Colour: Why Size Matters (The Scale Effect)

This is the big one, the concept that can elevate a good model to a great one: the scale effect. We touched on it before, but let’s really unpack it.

In the real world, objects that are far away look paler, less detailed, and slightly bluer than they do up close. Think about looking at a distant range of hills; they appear as hazy, light blue-grey shapes, even though you know they are covered in rich green trees and dark brown earth up close. This is caused by the atmosphere – tiny particles of water and dust in the air that scatter light. This phenomenon is often called ‘aerial perspective’.

How does this apply to your 1/72 scale Spitfire? Well, in a way, you are viewing that Spitfire from a great distance. If you were looking at a real Spitfire from far enough away for it to appear the same size as your model, aerial perspective would have taken effect. Therefore, to make our models look realistic and not like toys, we need to replicate this. A model painted in the exact, factory-fresh colour of the real thing will almost always look too dark and too saturated.

How to Do It – The Basics:

  • The Rule of Thumb: A good starting point is to lighten your base colour by about 10-15% for 1/72 scale, maybe 5-10% for 1/48, and just a touch for the larger 1/35 and 1/24 scales.
  • What to Add: Don’t just add white, as this can make the colour look chalky and washed out. Try adding a few drops of a light buff, a pale grey, or a lightened version of the base colour itself. For a Panzer Grey, add a little light grey. For an Olive Drab, a touch of a sandy brown or khaki can work wonders.

How to Do It – Advanced: Colour Modulation

Have you ever seen a model of a tank that seems to have different shades of the same colour on different panels? That’s likely Colour Modulation. This is the scale effect taken to the next level. Instead of lightening the colour for the whole model, you vary the shade on different areas to enhance the model’s shape and create visual interest.

  • Think About the Sun: Surfaces pointing upwards (like the top of a turret or the bonnet of a lorry) would get the most light, so they get the lightest shade.
  • Vertical Surfaces: The sides of the vehicle get a ‘mid-tone’, the ‘true’ colour you’ve mixed.
  • Lower and Recessed Areas: The undersides and nooks and crannies get the darkest shade, perhaps even the colour straight from the pot.

This technique is especially effective on subjects with a single overall colour, as it prevents them from looking flat and boring. It’s an artistic interpretation, for sure, but it’s rooted in the real-world physics of light.

Let There Be Light! (But Which Kind?)

Have you ever painted a model under your warm, yellowish desk lamp, only to see it in natural daylight the next day and find the colour has completely changed? That’s because light itself has a colour, known as its ‘colour temperature’. Here’s a fun fact for your next model club meet: this phenomenon has a scientific name, Metamerism. It’s what happens when two colours look the same under one light source, but different under another.

How to Do It:

  • Know Your Kelvins: Light temperature is measured in Kelvins (K). Warm light is around 2700K. Neutral, midday sun is between 5000K and 6500K. This is the sweet spot you should be aiming for at your workbench. Look for “Daylight Bulbs” in this Kelvin range.
  • Paint and Display in Harmony: Ideally, the light you build under should be the same as the light you display under. If your display cabinet has warm LEDs, consider having a warm light source at your desk to check your colours before you commit.
  • The Window Test: Before you declare a colour “done”, take a test piece and look at it under different lights. Check it by a window, under your desk lamp, and in its final display spot.

The Little Square of Lies: Don’t Trust the Swatch

Those little colour squares on the paint pot lid, in a printed catalogue, or on a website are, at best, a rough guide.

Why are they so inaccurate?

  • Ink vs. Paint: The swatch is printed with ink. Your model is painted with acrylic, enamel, or lacquer. They are chemically different and reflect light differently.
  • The Finish Line: The colour on a glossy paper sticker will look very different from that same colour painted onto matt plastic.
  • The Power of the Primer: A coat of paint is rarely 100% opaque. The colour of the primer underneath will have a subtle effect. This is a tool you can use! A pink or sandy-brown primer under a yellow or red topcoat can give it a wonderful warmth.
  • Brand Loyalty? Not for Colours! A bottle of “RAF Dark Green” from Tamiya will not be a perfect match for one from Vallejo or AK Interactive.

How to Do It: The Paint Mule

The single most useful tool in your paint arsenal is the ‘paint mule’. Never go straight to your model with a new colour. Grab a piece of scrap plastic – an old model part, a spare wing, or the modeller’s classic choice: a set of plastic spoons. Prime it, paint it, and clear-coat it exactly as you plan to with your actual model. Only then will you see the true final colour.

The Company It Keeps: How Adjacent Colours Change Everything

Your brain actively interprets the colours your eyes see, and one of its favourite tricks is to adjust colours based on what’s next to them. This is called simultaneous contrast.

This directly affects your models, especially those with camouflage. On a German WWII tank, the Dunkelgelb (dark yellow) will appear a different shade where it borders the Rotbraun (red-brown) compared to where it borders the Olivgrün (olive green). When you’re choosing your colours, don’t just look at them in isolation. If possible, paint them on your test mule next to the other colours they’ll be sitting with on the final model.

The Human Factor: A Different View

As if all that wasn’t enough, the final variable is you. The simple fact is that we don’t all see colour in exactly the same way, and our perception changes as we get older.

  1. The Personal Rainbow: Even among people with “normal” vision, the exact sensitivity of our eyes’ cone cells varies. On top of that, common conditions like red-green colour vision deficiency (CVD) can make it difficult to distinguish between certain shades of red, brown, and green.
  2. The Ageing Eye: This is a big one. As we age, the lens of our eye naturally yellows a little. It’s like looking through a permanent, faint, yellow-tinted filter. This makes whites look creamy, warms up all colours, and makes it much harder to distinguish between dark blues, greens, and violets. Good, strong, neutral lighting on your workbench becomes absolutely essential to counteract this effect.

Gloss, Matt, or Satin? The Finish Line is Just the Beginning

The final varnish you apply has a massive impact on the perceived colour. It’s not just for protection; it’s the final step in your colour-crafting process.

  • Gloss Varnish: A smooth, mirror-like surface. It makes colours appear darker, deeper, and more saturated.
  • Matt Varnish: A microscopically rough surface. It scatters light, making colours appear lighter and less saturated. This is the most “realistic” finish for many military vehicles.
  • Satin Varnish: The happy medium, with a slight sheen, perfect for subjects like modern jets or civilian cars.

Applying that final matt coat can be a nerve-wracking moment, as it often seems to knock back your weathering effects. Don’t panic. Let it dry completely. Often, the effect will partially return, just more subtle and realistic.

Final Thoughts: It’s Your Model, Trust Your Eyes

Don’t get bogged down in the endless online debates about the exact historical paint code. Paint faded, it varied between batches, and as we’ve just discussed, not everyone even sees colour the same way. There is rarely one single “correct” colour.

Your goal should be a believable colour, not a mythical perfect match. Does it look right to you? Does it convey the sense of scale, the environment, and the story you want to tell?

Embrace the process. Lighten your colours for scale, work under good light, always test on a mule, and be mindful of how colours and finishes interact. After all, it’s your model, and the only person it needs to look right to is you. Now, go and get some paint on some plastic!