Your search for "mustard yellow" revealed the following:

Retro Yellow Rainbow Sunglasses Balloons | 37 Inch
New
Out stock
$10.50
Lightening Bolt Paper Cups  | Set 6
New
Out stock
$4.95
Lemon Fruit Balloon | 18 INCH
New
Out stock
$1.50
Super Hero Party Picks | Set 24
New
Out stock
$3.95
Yellow | 16 INCH | Qualatex Latex Balloons | Package 10
New
Out stock
$4.80
Marblez Orbz Balloons | Pastel | 16 INCH
New
Out stock
$5.75
Citrine Yellow | 36 Inch | Qualatex Latex Balloons | Each
New
Out stock
$6.00
Yellow | 11 INCH | Qualatex Latex Balloons | Package 10
New
Out stock
$3.90
Vintage Race Car Latex Balloons | Package 6
New
Out stock
$5.50
Pearl Lemon Chiffon Latex Balloons | 16 INCH (40cm) | Package 6
New
Out stock
$4.80
Minion Airwalker Balloons | Dave | 43 INCH
New
Out stock
$23.50