Button Colour problems

Hi Ive rearranged the parallax sections and now my buttons on a white background cant be seen. Its like theyve changed to the same code as on a coloured background. How can i fix? Ive tried adding new sections but once i update it is wrong again.

See on bubblefabulous.co.nz

Hi there,
Thanks for reaching out.
In reference to your question here, could you possibly try out the following CSS code under the Appearance>Customize>Additional CSS section:

a.btn.btn-lg.btn-white {
background: #745cf9;

I hope this helps.
Best Regards,