A word/phrase means "a small amount" (of a color)

I am looking for a quantifier means "a small amount”, similar to but more advanced than "a little bit", for the sentence:

The northern lights are neon green mixed with _______ purple.

Merriam-Webster lists words like:

smidgen, driblet, skosh, scruple, iota, etc.

Not sure which one fits the said context best. Need some help. Thanks.

EDIT: To give you more context, here is the picture of what I want to describe. https://www.nbcnews.com/mach/science/dragon-aurora-dancing-over-iceland-captured-stunning-photo-ncna974656 The first picture, largely neon green with a little purplish at the edge.

Solution 1:

Tinge

1 : a slight staining or suffusing shade or color

The Northern Lights neon green with a tinge of purple.

The word tint also has validity here.

1a : a usually slight or pale coloration : HUE

The Northern Lights are neon green with the slightest purple tint to them.

Both of these words have the advantage of being associated with color specifically.

You can also use hint.

3 : a very small amount : SUGGESTION

The Northern Lights are neon green with a hint of purple fringing.

Solution 2:

I like dab for this context, because it's associated with paint as both a noun and a verb:

dab noun
1: a sudden blow or thrust : POKE
2: a small amount
3: a gentle touch or stroke : PAT
4: DAUB

dab verb dabbed; dabbing

1: to strike or touch lightly : PAT
//dabbing her eyes with a handkerchief
2: to apply lightly or irregularly : DAUB
//dab paint
_{from m-w.com}

Further,

A dab is a quick, soft application of something, like paint or makeup. [...] A dab is the motion with which you pat or apply something to a surface, and it's also the tiny amount of material you're applying. An artist might work in dabs of paint...
_{from vocabulary.com}