Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Color
#3980ea
#3980ea
hex
#3980eargb
rgb(57, 128, 234)hsl
hsl(216, 81%, 57%)oklch
oklch(0.61 0.175 258.5)Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2225
Colors that go with #3980ea
Crimson, Copper 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.
Crimson #dc143c
triadicshippedCrimson completes a triad with #3980ea — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Copper #b87333
complementaryshippedCopper sits directly opposite #3980ea 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 #3980ea in 4 real palettes, including Heatwave and Blueprint, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3980ea: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #3980ea in 5 real palettes, including Astro's brand system and Calm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #3980ea in 4 real palettes, including Discord's brand system and Telehealth, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #3980ea in 6 real palettes, including Readymag's brand system and Replit's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #3980ea in 5 real palettes, including Readymag's brand system and Notion's brand system, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #3980ea
Tints & shades
Harmonies
Contrast
| #3980ea as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.85:1 | fail | pass | fail | |
Aaon black | 5.45:1 | 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 #3980ea as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#3980ea reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #3980ea
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 #3980ea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3980ea-9ca7c4-df5f4e-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