Color
#37b371
#37b371rgb(55, 179, 113)hsl(148, 53%, 46%)oklch(0.683 0.146 155.5)Colors that go with #37b371
Charcoal, Midnight Blue and Mustard Yellow 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 #37b371: softer than #000 and cool enough to feel like part of the same palette.
Midnight Blue #191970
shipped4 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #37b371, as the text colour against it.
Mustard Yellow #ffdb58
shipped4 real palettes, including Meadow and Diner put Mustard Yellow beside #37b371, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #37b371 in 5 real palettes, including Khan Academy's brand system and Console Light, as the accent.
Taupe #483c32
shippedTaupe is paired with #37b371 in 14 real palettes, including Chime's brand system and Undergrowth, as the lead colour.
Fuchsia #ff00ff
complementaryFuchsia sits directly opposite #37b371 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Medium Purple #9370db
split-complementshippedMedium Purple is a split-complement of #37b371: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shipped3 real palettes, including Unity's brand system and Spotify's brand system put Blue beside #37b371, as the supporting colour.
Real palettes that use #37b371
Tints & shades
Harmonies
Contrast
| #37b371 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.68:1 | fail | fail | fail | |
Aaon black | 7.85:1 | 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 #37b371 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 #37b371 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/37b371-a2beb2-d259d4-1f2d2c-eaf1e9?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