Excited fuchsias and calming blues are among the hues engaged in “Conversations in Color,” a four-woman show at Martha Spak Gallery. All the participants draw from cubism and abstract expressionism, but jumble such precedents in lively ways. They sometimes incorporate representational elements, and occasionally disrupt the overwhelmingly flat imagery with illusions of depth. Atypical, yet somehow characteristic, is an Octavia Frazier still life in which one-dimensional blocks of colors abut renderings of fruit that are modeled to simulate roundness.

The artworks are all paintings, but some feature collaged bits. Their titles often refer to nature, although such inspirations are not always literally visible. Tidiest are Kay Walsh’s abstractions, whose forms are mostly rounded but often hard-edged. Marthe McGrath and Jennifer Duncan array pigment more loosely, evoking the natural world with rich greens (in one of McGrath’s pictures) or literal leaves or trees (in two of Duncan’s). Yet all four artists share a taste for hot oranges and pinks that make their visual chatter bold and scintillating.