Color
#2178ab
#2178abrgb(33, 120, 171)hsl(202, 68%, 40%)oklch(0.547 0.112 240)Colors that go with #2178ab
Charcoal, Royal Blue 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 #2178ab: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #2178ab's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #2178ab in 7 real palettes, including Lemon Squeezy's brand system and Wired's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #2178ab in 5 real palettes, including Pixar's brand system and Readymag's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #2178ab in 7 real palettes, including Glacier and Hershey's's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #2178ab in 11 real palettes, including Retro Pop and State Farm's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Firebrick #b22222
shippedFirebrick is paired with #2178ab in 4 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Goldenrod #daa520
shippedGoldenrod is paired with #2178ab in 4 real palettes, including Sapphire & Gold and Open House, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #2178ab
Tints & shades
Harmonies
Contrast
| #2178ab as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.84:1 | pass | pass | fail |
|
Aaon black | 4.34:1 | 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 #2178ab as the background.
Brands using this color
Fonts for this mood
#2178ab 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 #2178ab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/2178ab-9cb1c4-df4e5f-1f222d-e9f1f0?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