Color
#3fb2e4
#3fb2e4rgb(63, 178, 228)hsl(198, 75%, 57%)oklch(0.721 0.124 231.1)Colors that go with #3fb2e4
Charcoal, Amber 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 #3fb2e4: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #3fb2e4 in 5 real palettes, including Salesforce's brand system and Blueprint, as the accent.
Blue #0000ff
shipped4 real palettes, including Warp's brand system and Unity's brand system put Blue beside #3fb2e4, as the supporting colour.
Dark Orange #ff8c00
shippedDark Orange shows up next to #3fb2e4 in 4 real palettes, including Learning App and Elastic's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #3fb2e4: 6 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #3fb2e4 in 4 real palettes, including Terminal and Telehealth, as the lead colour.
Midnight Blue #191970
shipped8 real palettes, including Confluent's brand system and Kraken's brand system put Midnight Blue beside #3fb2e4, as the lead colour.
Coral #ff7f50
complementaryCoral sits directly opposite #3fb2e4 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 #3fb2e4
Tints & shades
Harmonies
Contrast
| #3fb2e4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.41:1 | fail | fail | fail | |
Aaon black | 8.7:1 | 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 #3fb2e4 as the background.
Brands using this color
Fonts for this mood
#3fb2e4 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 #3fb2e4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3fb2e4-9cb3c4-df4e69-1f232d-e9f1f0?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