Cross-brand swaps do not really exist for Signal Green; the closest color anywhere, The Army Painter Radiation Glow at 74 percent, sits in a different finish class, so it is a reference not a substitute. Signal Green is a very light vivid green with a cool undertone. For a true match, stick with the original; cross-brand substitutes will read as a different color.
Signal Green equivalents in other ranges
We ran Humbrol Signal Green against every mapped catalog and came up empty: no brand makes a color close enough to call an equivalent.
Even the nearest color, The Army Painter Radiation Glow, dries clearly more muted and warmer than Signal Green, so any substitute will change how the scheme reads.
How to read the score
90+Close
80sUsable
<70Mix
The Army Painter
About this color
Color profile
Pairs well with
Try any paint in the scheme toolMatch difficulty
Found in 0 other brands with a same-finish match.
Where painters use it
Frequently asked
What is the closest equivalent to Humbrol Signal Green?
No same-finish equivalent is close enough to call a straight swap. The nearest color overall is The Army Painter Radiation Glow at 74%, in a different finish class.
What color is Signal Green?
Signal Green is a very light vivid green with a cool undertone (hex #39FF14).