Arctic
Open in tool →Navy type on white with an ice-blue accent: crisp and corporate without going grey.
Color
#3fa2e9
#3fa2e9
hex
#3fa2e9rgb
rgb(63, 162, 233)hsl
hsl(205, 79%, 58%)oklch
oklch(0.686 0.139 243.8)Closest name: Cerulean (#55aaee)Relative luminance 0.3278
Colors that go with #3fa2e9
Charcoal, Peru and Amber 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 #3fa2e9: softer than #000 and cool enough to feel like part of the same palette.
Peru #cd853f
complementaryshippedPeru sits directly opposite #3fa2e9 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #3fa2e9 in 7 real palettes, including Salesforce's brand system and NBA's brand system, as the accent.
Blue #0000ff
shipped5 real palettes, including Unity's brand system and Qualcomm's brand system put Blue beside #3fa2e9, as the supporting colour.
Dark Orange #ff8c00
shippedDark Orange shows up next to #3fa2e9 in 4 real palettes, including Elastic's brand system and Learning App, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3fa2e9: 6 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the accent.
Light Sky Blue #87cefa
shippedLight Sky Blue is paired with #3fa2e9 in 4 real palettes, including Calm's brand system and Salesforce's brand system, as the supporting colour.
Medium Sea Green #3cb371
triadicshippedMedium Sea Green completes a triad with #3fa2e9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #3fa2e9
Tints & shades
Harmonies
Contrast
| #3fa2e9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.78:1 | fail | fail | fail | |
Aaon black | 7.56:1 | 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 #3fa2e9 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
#3fa2e9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #3fa2e9
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 #3fa2e9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3fa2e9-9cafc4-df4e58-1f212d-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