Color
#3d9599
#3d9599rgb(61, 149, 153)hsl(183, 43%, 42%)oklch(0.619 0.083 199.4)Colors that go with #3d9599
Charcoal, Copper and Cobalt 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 #3d9599: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
split-complementshippedCopper is a split-complement of #3d9599: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #3d9599: 5 real palettes, including Fintech Trust and Intel's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #3d9599 in 9 real palettes, including Diner and Redfin's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3d9599: 12 real palettes, including Peacock and Gopro's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #3d9599 in 5 real palettes, including Ledger Dark and Noir Beauty, as the lead colour.
Midnight Blue #191970
shipped9 real palettes, including Tide Pool and Ford's brand system put Midnight Blue beside #3d9599, as that palette's text colour.
Orange #ffa500
shipped4 real palettes, including Gopro's brand system and Campus put Orange beside #3d9599, as the accent.
Real palettes that use #3d9599
Tints & shades
Harmonies
Contrast
| #3d9599 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.53:1 | fail | pass | fail | |
Aaon black | 5.96:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d9599 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#3d9599 reads as cool, modern. The font library is tagged with the same vocabulary:
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 #3d9599 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3d9599-a2b9be-d4598e-1f262d-e9f1ee?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