There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Sepia
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Coffee
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Walnut
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Chocolate Brown
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Sienna
Enough lightness contrast to read as two distinct colours without feeling harsh.
Rust
Enough lightness contrast to read as two distinct colours without feeling harsh.
Chestnut
Enough lightness contrast to read as two distinct colours without feeling harsh.
Brick Red
Enough lightness contrast to read as two distinct colours without feeling harsh.
White
Strong lightness contrast and saturation for a bold, graphic pairing.
Mint Cream
Strong lightness contrast and saturation for a bold, graphic pairing.
Off-White
Strong lightness contrast and saturation for a bold, graphic pairing.
Ivory
Strong lightness contrast and saturation for a bold, graphic pairing.
Spring Green
A saturated accent from a different hue family for a deliberate pop of contrast.
Lime
A saturated accent from a different hue family for a deliberate pop of contrast.
Cyan
A saturated accent from a different hue family for a deliberate pop of contrast.
Chartreuse
A saturated accent from a different hue family for a deliberate pop of contrast.
White
Meets WCAG AA contrast (8.2:1) for normal text if used as text/background.
Ivory
Meets WCAG AA contrast (8.2:1) for normal text if used as text/background.
Mint Cream
Meets WCAG AA contrast (8.1:1) for normal text if used as text/background.
Azure
Meets WCAG AA contrast (8.0:1) for normal text if used as text/background.