You’re gettin’ lectured.
If the terms of the competition stipulated that you would do this by yourself, then you may “win” by cheating, but you’ll be without honor and a bit of your soul will die.
If there was no such stipulation, then you’re not cheating. Game on. Don’t forget “Red Rubber Ball”.
“Green, Green Grass of Home” var. artists, but I like the Tom Jones version
“Red Neck, White Socks and Blue Ribbon Beer” Can’t remember the artist, but it’s country from the 70s. Does this count for 3?
“Blue Velvet” Paul Anka (?)
“Venus in Blue Jeans” Frankie Avalon
“Baby’s Got Her Blue Jeans On”
“Roses are Red”
“Lavender Blue (Dilly, Dilly)”
“The Lovely Lady in the Blue Mercedes”
I’m blue, da ba dee, da ba die…
It’s by Eiffel 65
This is just stuff I have on my shelf at hand but its mostly oddball stuff so it should help if unique counts:
The Chieftains
“Red is the Rose”
“The Long Black Veil”
“The Grey Fox”
“The Gold Ring”
“The Red Admiral Butterfly”
“The White Cockade”
“Paddy’s Green Shamrock Shore”
“Black Velvet Band” Trad.
By Silly Wizard
“Golden Golden”
“A Glint of Silver”
“The Gold Claddagh Ring”
“The Lark in the Clear Air” trad.
“Blue Moon” by those cute lil’ mice in “Babe”
Christy Moore
“Yellow Triangle”
“Black is the Colour”
“Bright Blue Rose”
“Yellow Furze Woman”
“Green Island”
“Exploring the Blue” Luka Bloom
If you are considering Band Names, dont forget Ladysmith Black Mambazo
“The Wearing of the Green” Trad.
The Pogues
“Red Roses for Me”
“A Pair of Brown Eyes”
“White City”
“5 Green Queens and Jean”
“Blue Heaven”
“Big Yellow Taxi” Joni Mitchell and others
Old Blind Dogs
“Pills of White Mercury”
"The Rose and the Lindsey O’ "
“Carbon” Tori Amos Carbon is so a color! look at any car color brochure that lists it!
“Black Coffee” Shemekia Copeland
“Somewhere over the Rainbow”
Altan
The Red Crow"
“The Blue Idol”
“Blackwater”
Jethro Tull
“Black Satin Dancer”
“One White Duck/0^10=Nothing at All” l
“Jack-In-The-Green”
“Rainbow Blues”
“Velvet Green”
“One Brown Mouse”
“Black Sunday”
“Flying Colours”
“Black and White Television”
Rhythym in Gold"
Gold-Tipped Boots, Black Jacket and Tie"
“White Innocence”
In A Black Box
In The Olive Garden
Black Mamba
Venus - Shocking Blue
Big Yellow Taxi - Joni Mitchell
Blue Bayou - Roy Orbison
Pink - Aerosmith
Red Headed Stranger - Willie Nelson
True Blue - Madonna
Regards from Chuck Pink - Leo Kottke
anything by
Blue Oyster Cult
Blues Traveler
Green Day
good luck
Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini
green grass of home by Tom Jones 
Red Rubber Ball–the Cyrkle
My Little Red Boat–?
Brown-eyed Handsome Man–Chuck Berry
Brown-eyed Girl
The Purple People Eater–?
White Sportcoat and a Pink Carnation
Red Sails in the Sunset
Black Widow–mean Link Wray instrumental
Walla wall bing bang. I’m done.
“Red” by King Crimson. That deserves some extra credit.
Paul McCartney & Wings
Red Rose Speedway
Kermit The Frog
It isn’t easy being Green
Eddie Albert
Theme from Green Acres
more albums:
“Red Heaven” by Throwing Muses
“King of the Delta Blues Singers” by Robert Johnson (uh…blues…blue…it should count)
singles:
“Red Red Wine” by UB40
“Yellow” by Coldplay
“Suite: Judy Blue Eyes” by Crosby, Stills, Nash, and Young
“White Wedding” by Billy Idol
“Purple Rain” by Prince
“Black Hole Sun” by Soundgarden
“Black Magic Woman” by Santana
“White Christmas” by Bing Crosby
“My Blue Heaven” by ?
“Mellow Yellow” by Donovan
“Orange Crush” by REM
“Tie A Yellow Ribbon” by Tony Orlando and Dawn
“Mr Blue Sky” by ELO (I think)
“Black or White” by Michael Jackson
“Yellow Submarine” by the Beatles
not singles, per se, but famous songs:
“Greensleeves”
“Yellow Rose of Texas”
I’ll think of more later. I used to have a list of these…I’ll look for it, but I probably tossed it.