Color
#63c5ab
#63c5abrgb(99, 197, 171)hsl(164, 46%, 58%)oklch(0.757 0.101 173.9)Colors that go with #63c5ab
Charcoal, Plum 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 #63c5ab: softer than #000 and cool enough to feel like part of the same palette.
Plum #dda0dd
complementaryshippedPlum sits directly opposite #63c5ab 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 Canva's brand system and Unity's brand system put Blue beside #63c5ab, as the accent.
Crimson #dc143c
shippedCrimson is paired with #63c5ab in 4 real palettes, including Tiffany & Co.'s brand system and Riot Games's brand system, as the supporting colour.
Midnight Blue #191970
shipped5 real palettes, including Confluent's brand system and Open House put Midnight Blue beside #63c5ab, as the lead colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Crayon Box and Fresh Juice put Mustard Yellow beside #63c5ab, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #63c5ab in 4 real palettes, including Brilliant's brand system and Docker's brand system, as the accent.
Slate Gray #708090
shipped10 real palettes, including Ledger Dark and Indigo SaaS put Slate Gray beside #63c5ab, as the supporting colour.
Real palettes that use #63c5ab
Tints & shades
Harmonies
Contrast
| #63c5ab as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.08:1 | fail | fail | fail | |
Aaon black | 10.11:1 | 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 #63c5ab 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 #63c5ab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/63c5ab-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