Dayglo (approx.)

e60b92		Corona Magenta
fe2891		Aurora Pink
ff086f		Neon Red
ff3142		Rocket Red
fd4f3f		Fire Orange
ff7124		Blaze Orange
f7b734		Arc Yellow
e4fc41		Saturn Yellow
5ed62d		Signal Green
289dbe		Horizon Blue Light
0062af		Horizon Blue Dark

Suitable backgrounds:

1c6b78		teal
a029d1		lavender
e70b93		fuchsia

Dayglow Rainbow (https://www.color-hex.com/color-palette/115011)

fe4da0		Dayglow Rainbow Red
ff7774		Dayglow Rainbow Orange
89e05a		Dayglow Rainbow Green
adf032		Dayglow Rainbow Yellow
28b8bf		Dayglow Rainbow Blue

Neon colors (https://simplicable.com/new/neon-colors)

Neon
04d9ff          Neon Blue
ff9933          Neon Carrot
fe4164          Neon Fuchsia
39ff14          Neon Green
fe019a          Neon Pink
bc13fe          Neon Purple
ff073a          Neon Red
cfff04          Neon Yellow
ff0055          Pinkish Red Neon

Electric
0ff0fc          Electric Cyan
fc74fd          Electric Flamingo
21fc0d          Electric Green
6600ff          Electric Indigo
ccff00          Electric Lime
ff3503          Electric Orange
ff0490          Electric Pink
bf00ff          Electric Purple
e60000          Electric Red
55ffff          Electric Sheep
8f00f1          Electric Violet
fffc00          Electric Yellow
ff003f          Electric Crimson

Fluorescent
08ff08          Fluorescent Green
ffcf00          Fluorescent Orange
fe1493          Fluorescent Pink
ff5555          Fluorescent Red
fc8427          Fluorescent Red Orange
00fdff          Fluorescent Turquoise
ccff02          Fluorescent Yellow
ff11ff          Light Neon Pink

Bright
dfff11          Bright Chartreuse
66ff00          Bright Green
ff08e8          Bright Magenta
fe01b1          Bright Pink
be03fd          Bright Purple
ff000d          Bright Red
ffcf09          Bright Saffron
fc0e34          Bright Scarlet
01f9c6          Bright Teal