Color
#42ae91
#42ae91rgb(66, 174, 145)hsl(164, 45%, 47%)oklch(0.681 0.108 172.1)Colors that go with #42ae91
Charcoal, Hot Pink and Copper 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 #42ae91: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #42ae91 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Copper #b87333
shippedDesigners have shipped Copper with #42ae91: 4 real palettes, including Clean Beauty and Riverbed, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #42ae91: 4 real palettes, including Canva's brand system and Spotify's brand system, as the supporting colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #42ae91 in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #42ae91: 4 real palettes, including Unity's brand system and Spline's brand system, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Fintech Trust and Tide Pool put Midnight Blue beside #42ae91, as the text colour against it.
Mustard Yellow #ffdb58
shipped5 real palettes, including Diner and Lido put Mustard Yellow beside #42ae91, as the accent.
Real palettes that use #42ae91
Tints & shades
Harmonies
Contrast
| #42ae91 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.73:1 | fail | fail | fail | |
Aaon black | 7.69:1 | 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 #42ae91 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 #42ae91 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/42ae91-a2beba-d459b5-1f2b2d-e9f1eb?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