Lagoon
Open in tool →Turquoise and teal with a sand-yellow on white — shallow tropical water; the deep teal text is the reef.
Color
#1cb5a3
#1cb5a3
hex
#1cb5a3rgb
rgb(28, 181, 163)hsl
hsl(173, 73%, 41%)oklch
oklch(0.696 0.12 182.2)Closest name: lightseagreen (#20b2aa)Relative luminance 0.3594
Colors that go with #1cb5a3
Charcoal, Hot Pink and Cornflower 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 #1cb5a3: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #1cb5a3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #1cb5a3: 4 real palettes, including Canva's brand system and Spotify's brand system, as the supporting colour.
Midnight Blue #191970
shipped8 real palettes, including Ford's brand system and Fintech Trust put Midnight Blue beside #1cb5a3, as the lead colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Diner and Crayon Box put Mustard Yellow beside #1cb5a3, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #1cb5a3 in 7 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #1cb5a3 in 13 real palettes, including Resort and Crayon Box, as the text colour against it.
Tomato #ff6347
split-complementshippedTomato is a split-complement of #1cb5a3: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #1cb5a3
Tints & shades
Harmonies
Contrast
| #1cb5a3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.56:1 | fail | fail | fail | |
Aaon black | 8.19:1 | 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 #1cb5a3 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 #1cb5a3
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 #1cb5a3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/1cb5a3-a2bebe-d459a3-1f292d-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