Studio Grey
Open in tool →A pure greyscale with a single electric blue — the portfolio palette that makes work look considered.
Color
#4289fa
#4289fa
hex
#4289fargb
rgb(66, 137, 250)hsl
hsl(217, 95%, 62%)oklch
oklch(0.643 0.183 259.4)Closest name: dodgerblue (#1e90ff)Relative luminance 0.2595
Colors that go with #4289fa
Deep Sky Blue, Medium Sea Green and Dark Goldenrod 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 #4289fa in 4 real palettes, including Blueprint and Remix's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
triadicshippedMedium Sea Green completes a triad with #4289fa — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Goldenrod #b8860b
complementaryDark Goldenrod sits directly opposite #4289fa 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 #4289fa: softer than #000 and cool enough to feel like part of the same palette.
Midnight Blue #191970
shippedMidnight Blue is paired with #4289fa 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 #4289fa: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Olive Drab #6b8e23
split-complementOlive Drab is a split-complement of #4289fa: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #4289fa in two real palettes: Heatwave and Blueprint, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #4289fa
Tints & shades
Harmonies
Contrast
| #4289fa as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.39:1 | fail | pass | fail | |
Aaon black | 6.19:1 | 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 #4289fa as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#4289fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #4289fa
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 #4289fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/4289fa-9ca7c4-df624e-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