Arcade
Open in tool →Hot pink, cyan and acid yellow on near-black — cabinet-glow neon; the black surface is what makes the colours light up.
Color
#21ebf2
#21ebf2
hex
#21ebf2rgb
rgb(33, 235, 242)hsl
hsl(182, 89%, 54%)oklch
oklch(0.855 0.142 198.8)Closest name: Aqua (#0ff0fe)Relative luminance 0.6615
Colors that go with #21ebf2
Charcoal, Deep Sky Blue and Light Coral 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 #21ebf2: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
analogousshippedDeep Sky Blue is #21ebf2's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Light Coral #f08080
complementaryshippedLight Coral sits directly opposite #21ebf2 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #21ebf2 in 4 real palettes, including Formula 1's brand system and Tiffany & Co.'s brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #21ebf2 in 8 real palettes, including Astro's brand system and Boeing's brand system, as the text colour against it.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #21ebf2: 3 real palettes, including Bluesky Social's brand system and Patreon's brand system, as the lead colour.
Light Pink #ffb6c1
shippedLight Pink shows up next to #21ebf2 in 3 real palettes, including Macaron and Pastel Pop, as the lead colour.
Wheat #f5deb3
shippedDesigners have shipped Wheat with #21ebf2: 3 real palettes, including Mint Chip and Oatly's brand system, as the accent.
Real palettes that use #21ebf2
Tints & shades
Harmonies
Contrast
| #21ebf2 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.48:1 | fail | fail | fail | |
Aaon black | 14.23:1 | 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 #21ebf2 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
Fonts for this mood
#21ebf2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #21ebf2
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 #21ebf2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/21ebf2-a2babe-d45990-1f272d-e9f1ee?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