Color
#31bf88
#31bf88rgb(49, 191, 136)hsl(157, 59%, 47%)oklch(0.718 0.143 162.1)Colors that go with #31bf88
Charcoal, Hot Pink and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #31bf88: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #31bf88 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Unity's brand system and Spotify's brand system put Blue beside #31bf88, as the supporting colour.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #31bf88 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #31bf88 in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Midnight Blue #191970
shipped4 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #31bf88, as the text colour against it.
Mustard Yellow #ffdb58
shipped5 real palettes, including Fresh Juice and Meadow put Mustard Yellow beside #31bf88, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #31bf88 in 5 real palettes, including Khan Academy's brand system and Docker's brand system, as the accent.
Real palettes that use #31bf88
Tints & shades
Harmonies
Contrast
| #31bf88 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.35:1 | fail | fail | fail | |
Aaon black | 8.94:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #31bf88 as the background.
Brands using this color
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #31bf88 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/31bf88-a2beb7-d459c4-1f2c2d-e9f1ea?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md