Blueprint
Open in tool →Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.
Color
#1fc3f4
#1fc3f4
hex
#1fc3f4rgb
rgb(31, 195, 244)hsl
hsl(194, 91%, 54%)oklch
oklch(0.762 0.14 225.2)Closest name: deepskyblue (#00bfff)Relative luminance 0.4585
Colors that go with #1fc3f4
Charcoal, Denim and Dodger 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 #1fc3f4: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDesigners have shipped Denim with #1fc3f4: 4 real palettes, including Venmo's brand system and UEFA's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #1fc3f4: 4 real palettes, including Figma's brand system and Patreon's brand system, as the accent.
Midnight Blue #191970
shipped8 real palettes, including Kraken's brand system and Confluent's brand system put Midnight Blue beside #1fc3f4, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #1fc3f4 in 7 real palettes, including 1password's brand system and Elastic's brand system, as the accent.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #1fc3f4: 4 real palettes, including Astro's brand system and Deep Water, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #1fc3f4 in 8 real palettes, including Astro's brand system and Cursor's brand system, as the text colour against it.
Coral #ff7f50
complementaryCoral sits directly opposite #1fc3f4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #1fc3f4
Tints & shades
Harmonies
Contrast
| #1fc3f4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.06:1 | fail | fail | fail | |
Aaon black | 10.17:1 | 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 #1fc3f4 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#1fc3f4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #1fc3f4
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 #1fc3f4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/1fc3f4-9cb6c4-df4e72-1f242d-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