It wasn't just neon. Some colour combinations just scream "80s!", especially pink and jade diagonal flashes. Stripes, stripes, stripes were everywhere, and "black plus a colour".
pseudo kilim patterns on plastic tablecloths in shades of navy, jade, burgundy and ochre – these took a long, long, long time to go away.
red, grey and white on curtains etc.
pink and grey, especially in pseudo Japanese flowers on coffee cups
pseudo marble tiles in grey, apricot, and/or navy
all woodwork stained dark browny-red inside and out
terra cotta especially with French blue
yellow, pink, stone
grey, black and red
apricot, French blue, the two combined, the two combined with lemon
ombré effects on pseudo silk-painted pseudo Japanese flowers (pink, grey, jade and apricot on black)
tongue and groove on ceilings
stripes on carpet
wall and floor tiles set diagonally
stripes on crockery
white slashes painted on in pairs to look like reflections on a shiny surface
blocks of green, pink and purple on anoraks for fell-walking
rag rolling and sponging
“artisanal” beige tiles
wallpaper with white trellis arches and pink flowers
mosaic tiles (in bathrooms, but also on tables, trays, placemats and coasters)
dupion taffeta (especially plaid)
fabric printed with strawberries or slices of cake
basket-work wallpaper in black and gold like the seat of a cane-bottomed chair
fake leaded windows
splatter paint, speckled finishes that came in a can
the Crafts Council gold swirl
More here, and links to the rest.