Squid Jig Foil Colours

Same mackerel, pilchard or yellowtail pattern — so why do some jigs run silver foil underneath, and others gold, red or rainbow?

Most people pick a jig by its outer colour and never think about the foil under the cloth. In reality, the fish pattern decides what your jig imitates; the foil decides how it reflects light and shapes up underwater — and from a distance, a squid’s first impression usually comes from the foil, not the pattern.

If you haven’t sorted your outer colours yet, start with the squid jig colours guide; to judge foil together with fall speed, pair it with the sink rate guide.

Remember this first

Silver for flash, gold for water colour, red for silhouette, rainbow for change. No foil wins everywhere — light, water colour, depth and how the squid are reacting on the day decide which one to tie on.

One map: light × water colour

Work out where today’s light and water sit on this map, and you know which jig to tie on first.

The four foils at a glance

How they stack up across seven real conditions

The scores below are relative positioning to make this easy to remember, not lab measurements. They assume the same pattern, size, cloth and retrieve — only the foil changes.

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Silver foil: the closest thing to a real baitfish

Silver’s core strength is the moment your jig turns, darts or changes its sink angle: it throws a burst of light that looks exactly like scale flash.

Real baitfish don’t glow steadily like a light bulb. They flash — a sudden streak of silver-white as they turn, bolt or change direction, then go dark again. A silver-foil jig triggers squid with exactly that bright–dark–bright rhythm.

For blue-and-green-backed, silver-bellied patterns like mackerel, silver foil completes the visual logic:

The outer pattern imitates the species; the silver foil imitates the scale reflection.

Best for: bright sun, clean water, shallow to mid depths, baitfish over the weed beds, squid actively chasing, fast searching from a boat, and aggressive retrieves with repeated darts.

Strengths:

• Highest realism — when you can see silvery baitfish around, or squid are clearly chasing bait, silver is the natural match.
• Strong long-range search — as the jig swings, some angle suddenly catches the sun and throws a short, unmistakable flash. Squid may not read the pattern from afar, but they notice that.
• Natural fit with blue, green and mackerel patterns — blue-green back over a silver belly is as close as it gets to real mackerel or yellowtail.

Weaknesses: the flash can be too much. In gin-clear shallow water, dead-calm conditions or hard-fished spots, squid have time to study the jig — a strong mirror flash often draws a fast follow that stops short: the squid tracks it, keeps its distance, backs off the moment you twitch. Silver is a great finding colour but not always the closing colour. And silver makes no light of its own — no sun, jetty lights or moon, and its advantage fades fast.

Gold foil: the steady everyday workhorse

Gold doesn’t throw silver’s cold white flash. It reflects a warmer gold-amber glint — and in green, grey-green or slightly murky water that warm tone often holds a steadier, easier-to-read contrast than white flash does.

Note what this is not saying: gold light does not penetrate deeper. The accurate version is:

In a lot of inshore water colours, gold gives a steadier, more recognisable warm contrast.

Best for: later morning and earlier evening, mixed sun and cloud, green-tinged water, a little silt or algae in the water, in-between conditions — and any day you can’t decide between loud flash and quiet.

Strengths:

• Widest water-colour range — silver’s cold flash starts blending into the scatter in green water; gold’s warm reflection keeps separating from it.
• Softer than silver, searchier than red — still plenty of flash, but not as cold or sharp; the compromise between search power and stability.
• Hardest to get wrong when conditions are unclear — water not quite clear, not quite dirty, light neither bright nor dark: tie on gold first.

Weaknesses: gold is good almost everywhere and rarely first anywhere extreme — ultra-clear water in bright sun goes to silver, deep low light goes to red, fast-changing skies go to rainbow. And if the bait around is clearly silver-white, silver is strictly the better imitation.

Red foil: not a red flash — a dark silhouette

Red is the most misunderstood foil of the four.

The common story is “red works in deep water because red shows up better down deep.” The opposite is true — as depth increases, red loses its vividness early, fading through dark maroon and brown-black toward black.

So red foil’s real value in low light and deep water is not putting out red light. It is:

A deeper, more solid body silhouette showing through the outer cloth.

It emphasises the jig’s overall shape, not mirror-like scale flash.

Best for: around first light, the back end of dusk, heavy overcast, deep or dark water layers, reef and jetty shadow, deep weed edges, squid that follow a flashy jig but never commit — and any time you want less flash pressure and longer pauses.

Strengths:

• A stable outline in low light — silver and gold need the right light and angle to flash; red keeps the body reading full and dark even with no reflection, helping squid lock onto the shape.
• Turns attraction into commitment — when silver or rainbow has pulled a squid in but it hangs back, the same pattern in red keeps the baitfish outline while dropping the constant-flash pressure.
• At its best on the pause and natural sink — slow falls, long pauses, small twitches, playing a wounded baitfish: all red-foil territory. When the jig stops moving, the dark outline stays intact.

Weaknesses: weaker long-range search (no light of its own, no strong flash — in badly stirred water or full dark, distant squid may simply not see it); the lowest realism (real baitfish have silver-white bellies, not dark red cores); and in bright sun over shallow clear water it can look heavy — none of silver’s light, translucent liveliness.

Rainbow foil: testing squid with constant change

Rainbow foil isn’t one fixed colour. As the jig turns, changes sink angle or is viewed from a different position, different parts of it reflect different hues.

Silver’s rhythm is dark → silver flash → dark. Rainbow is closer to yellow-green flash → blue-violet flash → red-orange flash → dark. Squid at different angles, distances and directions may each be seeing a different jig.

Its strength isn’t imitating any single baitfish accurately — it’s using constantly changing reflections to stay noticeable in messy conditions.

Best for: sun-and-cloud days, fast-moving cloud, light that won’t stay put, clear to lightly green water, mid-to-high squid activity, fast boat searching, mixed bait species — and the first-cast test when you don’t yet know what the squid want.

Strengths:

• Best in unknown conditions — first session at a new spot, no idea whether squid want natural or loud, cold or warm: rainbow doesn’t make you guess right. Every turn of the jig offers a different look.
• The harder it darts, the more it changes — repeated darts and direction changes keep exposing new reflective faces. Deadly on active squid that are willing to chase.
• Suits mixed-bait water — keeps the fish shape while adding blue, green, violet, yellow and orange looks from different angles.

Weaknesses: less realistic than silver (real bait has some iridescence, but not a whole body cycling through strong colours); and the multi-colour flash can hold pressured squid at arm’s length — the classic pattern is a fast approach, a stall behind the jig, a long stare, gone on the next twitch. That means rainbow did the attracting but not the closing: switch to red, gold or a quieter natural, shrink the strokes, stretch the pauses.

One more thing to keep straight: standard rainbow foil is not glow. It’s a reflective material — no sun, moon or jetty light, no shine. Rainbow foil handles multi-colour reflection; a glow body charges and emits its own light; a UV body needs ultraviolet to fluoresce. Three different problems — see the UV vs glow section of the colours guide.

Same fish pattern, four different baitfish

Put the same mackerel skin on four jigs and the foils turn them into four different fish:

• Silver = the baitfish bolting — a sudden streak of silver as it turns; pure panicked-baitfish energy.
• Gold = the baitfish that stays visible in green water — warm reflection that keeps its presence in the murk.
• Red = the baitfish in the shadows, or the wounded one — less flash, heavier outline; slow, weak, catchable.
• Rainbow = the baitfish whose angle keeps changing — not strictly lifelike, but it keeps changing colour on the move and squid come to have a look.

Choosing for Melbourne conditions

Before you drive, check wind, swell and water clarity on the live Eging Tactical Radar, then pick your first jig off this table.

How to rotate: follow the squid’s feedback

Good rotation isn’t “no bite, random change.” Read what the squid are telling you:

Situations ② and ④ are the same problem underneath: the squid is already attracted and the last step is failing — and downgrading (darker, steadier, slower) is almost always more correct than upgrading. For the strike-timing half of that equation, see when to strike.

How to build your set

• One foil only: gold. Widest range — real search power, hard to over-stimulate with, steadier than silver in green or murky water.
• Two foils: silver + red. The two extremes covered: silver finds them in bright clear water; red closes them in low light and deep water.
• Three foils: silver + gold + red. Clear-and-bright, ordinary daylight, green water, low light and depth — most sessions handled.
• All four: rainbow earns its spot as the fast tester when conditions keep changing or you know nothing yet. Rotation order: sunny and clear, start silver; green or ordinary, gold; changing or unknown, rainbow; low light, deep, or followers that won’t grab, red.

The RUI baitfish-pattern series runs the same patterns across different foils, so you can build exactly these combos — browse the full squid jig range at eging.com.au, or match foils to conditions on the jig-by-conditions page.

The bottom line

There’s no absolute ranking — the four foils solve four different problems:

• Silver — closest to real scale flash. Keywords: natural, flash, sun, clear water.
• Gold — warm and steady. Keywords: stable, workhorse, warm glint, green water.
• Red — less mirror flash, more silhouette. Keywords: outline, deep, low light, closing.
• Rainbow — multi-colour change with angle. Keywords: change, search, adaptability, testing.

Silver is the most lifelike, gold the most stable, red the strongest outline, rainbow the best at change.

The outer pattern decides what baitfish your jig looks like; the foil decides whether that “fish” flashes, glows warm, goes dark, or keeps changing colour underwater. Once that clicks, jig choice stops being a colour preference and becomes a logical read of light, water colour, depth and how the squid respond.

To fold foil into the full jig-choosing logic — outer colour, size and sink rate together — start from the best squid jig Australia guide.