Color
#166ec5
#166ec5rgb(22, 110, 197)hsl(210, 80%, 43%)oklch(0.537 0.156 253.3)Colors that go with #166ec5
Charcoal, Crimson 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 #166ec5: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #166ec5 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #166ec5 in 6 real palettes, including Wikipedia's brand system and NBA's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #166ec5 in 12 real palettes, including Pixar's brand system and BBC's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #166ec5 in 10 real palettes, including Intel's brand system and General Mills's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Firebrick #b22222
shippedFirebrick is paired with #166ec5 in 5 real palettes, including AT&T's brand system and Campbell's's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #166ec5 in 4 real palettes, including Console Light and Telehealth, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #166ec5 in 11 real palettes, including Paramount+'s brand system and Discover's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #166ec5
Tints & shades
Harmonies
Contrast
| #166ec5 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.16:1 | pass | pass | fail |
|
Aaon black | 4.07:1 | 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 #166ec5 as the background.
Brands using this color
Fonts for this mood
#166ec5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #166ec5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/166ec5-9cabc4-df514e-1f202d-e9f1f1?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