Campus
Open in tool →Institutional blue with a highlighter-amber accent — trustworthy for parents, lively enough for students.
Color
#334fdb
#334fdb
hex
#334fdbrgb
rgb(51, 79, 219)hsl
hsl(230, 70%, 53%)oklch
oklch(0.5 0.215 268.3)Closest name: Arcane Brew (#5260e1)Relative luminance 0.1141
Colors that go with #334fdb
Slate Gray, Olive Green 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.
Slate Gray #708090
shippedSlate Gray is paired with #334fdb in 4 real palettes, including Campus and Indigo SaaS, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Olive Green #808000
complementaryOlive Green sits directly opposite #334fdb 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 #334fdb: softer than #000 and cool enough to feel like part of the same palette.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #334fdb in 3 real palettes, including Indigo SaaS and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #334fdb in 3 real palettes, including Telehealth and Blue Mono, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
split-complementSienna is a split-complement of #334fdb: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue Violet #8a2be2
analogousshippedBlue Violet is #334fdb's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #334fdb in two real palettes: Webflow's brand system and Blue Mono, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #334fdb
Tints & shades
Harmonies
Contrast
| #334fdb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.4:1 | pass | pass | fail |
|
Aaon black | 3.28:1 | fail | 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 #334fdb 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
Peacock
Open in tool →Teal, cobalt and magenta at full chroma on white — jewel tones in daylight; the trick is a near-black text with a blue cast.
Fonts for this mood
#334fdb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #334fdb
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 #334fdb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/334fdb-9c9ec4-df814e-231f2d-e9eef1?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