Color
#21c6fd
#21c6fdrgb(33, 198, 253)hsl(195, 98%, 56%)oklch(0.773 0.145 227.8)Colors that go with #21c6fd
Charcoal, Dodger Blue and Midnight 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 #21c6fd: softer than #000 and cool enough to feel like part of the same palette.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #21c6fd: 4 real palettes, including Figma's brand system and Patreon's brand system, as the accent.
Midnight Blue #191970
shipped6 real palettes, including Kraken's brand system and Telehealth put Midnight Blue beside #21c6fd, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #21c6fd in 7 real palettes, including 1password's brand system and NBA's brand system, as the accent.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #21c6fd: 4 real palettes, including Astro's brand system and Deep Water, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #21c6fd in 6 real palettes, including Astro's brand system and Cursor's brand system, as the text colour against it.
Coral #ff7f50
complementaryCoral sits directly opposite #21c6fd on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Light Coral #f08080
split-complementshippedLight Coral is a split-complement of #21c6fd: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #21c6fd
Tints & shades
Harmonies
Contrast
| #21c6fd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.99:1 | fail | fail | fail | |
Aaon black | 10.56:1 | 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 #21c6fd as the background.
Brands using this color
Fonts for this mood
#21c6fd reads as cool, vivid, technical. 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 #21c6fd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21c6fd-9cb5c4-df4e70-1f242d-e9f1ef?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