Please try those colors:
Sun:
ffae00
ff8600
ff4000
"Kreuzfahrten" Text:
0055ae
"Reisebuero" Text:
00a1e1
Ocean / Waves:
0066ff
0091ff
00a1e1
Use Font Arya Bold:
https://fonts.google.com/specimen/AryaTry to make the text with a little bit color gradient.
Try a very light contour on text.
If your logo have an orange sun bow, try to make it more thick and two or three-colored.