Keep a bright near-white canvas with generous whitespace and one periwinkle-indigo.
Set the whole system in Arcadia (≈ Hanken Grotesk); use tabular numerals for all money.
Reserve the soft dawn gradient for marketing heroes; keep product clean & monochrome + indigo.
Show money as inflow green / outflow ink — spending is normal, not alarming.
Keep charts smooth & quiet with a subtle hover crosshair; let numbers lead.