Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Color
#3689fc
#3689fc
hex
#3689fcrgb
rgb(54, 137, 252)hsl
hsl(215, 97%, 60%)oklch
oklch(0.64 0.189 257.6)Closest name: dodgerblue (#1e90ff)Relative luminance 0.257
Colors that go with #3689fc
Deep Sky Blue, Dark Goldenrod and Charcoal 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.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #3689fc in 4 real palettes, including Figma's brand system and Blueprint — a combination designers have actually shipped, not a computed rotation.
Dark Goldenrod #b8860b
complementaryDark Goldenrod sits directly opposite #3689fc on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3689fc: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #3689fc in 3 real palettes, including Behance's brand system and Blue Mono, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #3689fc in 3 real palettes, including Terminal and Console Light, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #3689fc in 3 real palettes, including Blue Mono and Telehealth, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Chocolate #d2691e
split-complementChocolate is a split-complement of #3689fc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Olive Green #808000
split-complementOlive Green is a split-complement of #3689fc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #3689fc
Tints & shades
Harmonies
Contrast
| #3689fc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.42:1 | fail | pass | fail | |
Aaon black | 6.14:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3689fc 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
#3689fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #3689fc
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 #3689fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3689fc-9ca8c4-df5d4e-201f2d-e9f0f1?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