Indigo SaaS
Open in tool →The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states.
Color
#12b587
#12b587
hex
#12b587rgb
rgb(18, 181, 135)hsl
hsl(163, 82%, 39%)oklch
oklch(0.687 0.139 166.4)Closest name: mediumseagreen (#3cb371)Relative luminance 0.3493
Colors that go with #12b587
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 #12b587: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #12b587 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 #12b587, as the supporting colour.
Midnight Blue #191970
shipped5 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #12b587, as the text colour against it.
Mustard Yellow #ffdb58
shipped6 real palettes, including Diner and Meadow put Mustard Yellow beside #12b587, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #12b587 in 6 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #12b587 in 15 real palettes, including Chime's brand system and Undergrowth, as the lead colour.
Tomato #ff6347
split-complementshippedTomato is a split-complement of #12b587: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #12b587
Tints & shades
Harmonies
Contrast
| #12b587 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.63:1 | fail | fail | fail | |
Aaon black | 7.99:1 | 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 #12b587 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #12b587
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #12b587 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/12b587-a2beb9-d459b7-1f2b2d-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