Thermal Colour Palettes Explained: White Hot, Black Hot, Red Hot & When to Use Each
- by Hunt The Night
Every thermal scope and monocular ships with a handful of colour palettes — white hot, black hot, usually a red or highlight mode, often several more. They all show the same sensor data, so which one you pick is purely about how easily your eye reads the scene in front of you. This guide explains what each common palette does, when each one earns its keep in Australian conditions, and which to leave alone.
Quick answer
White hot is the all-round default — warm objects glow light against a dark background, ideal for general scanning and detection. Black hot inverts that for a more natural, photo-like image that many shooters find easier for identifying detail, and it holds up well in fog and rain with the contrast raised. Red/highlight modes darken everything except the hottest objects, making heat sources pop while staying easy on the eyes. Multi-colour palettes (rainbow and similar) exaggerate temperature differences for tricky, cluttered scenes. No palette changes detection range, sensitivity or detail — pick for readability, switch when conditions change.
The common palettes at a glance
| Palette | What you see | Best for |
|---|---|---|
| White hot | Warm = white/light, cool = dark | General scanning and detection; the default that always works |
| Black hot | Warm = dark, cool = light — looks closest to a B&W photo | Identifying detail on animals; fog and rain with contrast up |
| Red hot / red monochrome | Only the hottest objects highlighted against a dark scene | Quick hot-spot pickup while scanning; long sessions with less glare |
| Sepia | Golden tones across the scene | Extended observation — gentle on the eyes |
| Rainbow / multi-colour | Hot-to-cold mapped across strong colours | Separating subtle temperature differences in cluttered or warm terrain |
White hot: the default for a reason
White hot is the palette nearly every thermal defaults to, and most shooters' scanning mode of choice. A fox, pig or deer holds more heat than paddock, scrub or timber at night, so it leaps out as a bright shape against a dark field. If you only ever used one palette, this is the one — it gives away the least in any single situation.
Black hot: detail and dirty weather
Black hot flips the map: warm objects render dark against lighter, cooler surrounds, which reads remarkably like a black-and-white photograph. Plenty of hunters find body shape, posture and fine features easier to judge this way — useful when you're deciding what an animal is rather than just where it is. It's also the go-to in fog, drizzle and humid air: with scene contrast flattened by moisture, black hot with contrast raised often keeps definition that white hot loses. Why damp air flattens thermal contrast in the first place is covered in our NETD explainer.
Red and highlight modes: making heat pop
Red hot and red monochrome darken almost everything and paint only the hottest objects bright. That makes them efficient scanning modes — anything alive jumps out instantly — and the darker overall picture causes less glare and eye strain over a long night behind the eyepiece. The trade-off is that scene context (fence lines, dams, tree lines) mostly disappears, so many shooters scan in a highlight mode and switch to white or black hot to assess what they've found. Sepia works on the same eye-comfort principle with its softer golden tones, suited to long, patient observation.
Rainbow and multi-colour: niche but real
Multi-colour palettes map the hot-to-cold range across strong colours, exaggerating small temperature differences. On warm evenings when rocks, bare ground and stock all hold similar residual heat — common across Australian summers — that extra separation can help split a subtle heat signature from a warm background. They look spectacular but most users treat them as a situational tool rather than a daily driver.
How to choose on the night
- Scanning paddocks for anything alive — white hot, or a red/highlight mode if your eyes are tiring.
- Working out what you've spotted — switch to black hot and judge shape and detail; see our fox and pig guides for full field workflows.
- Fog, drizzle, humidity — black hot with contrast raised.
- Warm ground after a hot day — try a multi-colour palette to separate animal from background.
- All-night sits — red monochrome or sepia to save your eyes.
Palette switching is usually one button — build the habit of matching the palette to the moment instead of leaving it wherever it shipped.
FAQ
Which palette is best for hunting?
There's no single best: white hot for finding, black hot for identifying is the pattern most experienced shooters settle into, with a highlight mode for fatigue-free scanning. The palette that lets you read the scene fastest is the right one.
Does black hot show more detail than white hot?
Both contain identical information — black hot simply presents it in a tonal arrangement many eyes parse more naturally, like a photograph. If fine detail seems easier in black hot for you, that's a perfectly good reason to use it.
Do colour palettes affect detection range?
No. Range comes from the objective lens working with sensor resolution and pixel pitch — see detection range and lens size. Palettes only change presentation.
Why does my thermal look flat and grey no matter the palette?
Low scene contrast (damp air) or an overdue calibration are the usual suspects, not the palette. Run an FFC/NUC and check focus — our sharpest-image guide walks through the full checklist.
Related: Get the Sharpest Thermal Image · How Thermal Imaging Works · Best Thermal Scopes Australia · Browse thermal scopes and thermal monoculars.
