Color
#18c39b
#18c39brgb(24, 195, 155)hsl(166, 78%, 43%)oklch(0.729 0.14 170.7)Colors that go with #18c39b
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 #18c39b: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #18c39b 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 Canva's brand system put Blue beside #18c39b, as the supporting colour.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #18c39b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Crimson #dc143c
shippedCrimson is paired with #18c39b in 4 real palettes, including DuckDuckGo's brand system and Riot Games's brand system, as the supporting colour.
Mustard Yellow #ffdb58
shipped5 real palettes, including Fresh Juice and Crayon Box put Mustard Yellow beside #18c39b, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #18c39b in 4 real palettes, including Khan Academy's brand system and Docker's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #18c39b in 16 real palettes, including Chime's brand system and Crayon Box, as the lead colour.
Real palettes that use #18c39b
Tints & shades
Harmonies
Contrast
| #18c39b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.25:1 | fail | fail | fail | |
Aaon black | 9.32:1 | 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 #18c39b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #18c39b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/18c39b-a2bebb-d459b1-1f2a2d-e9f1ec?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