Color
#178bd3
#178bd3rgb(23, 139, 211)hsl(203, 80%, 46%)oklch(0.613 0.144 243.7)Colors that go with #178bd3
Charcoal, Orange Red and Copper 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 #178bd3: softer than #000 and cool enough to feel like part of the same palette.
Orange Red #ff4500
split-complementshippedOrange Red is a split-complement of #178bd3: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Copper #b87333
complementaryshippedCopper sits directly opposite #178bd3 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 #178bd3 in 13 real palettes, including Wired's brand system and Beach Hut, as the accent.
Blue #0000ff
shipped11 real palettes, including Readymag's brand system and Qualcomm's brand system put Blue beside #178bd3, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #178bd3: 10 real palettes, including Hershey's's brand system and Glacier, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #178bd3 in 12 real palettes, including NASCAR's brand system and State Farm's brand system, as the supporting colour.
Deep Pink #ff1493
triadicshippedDeep Pink completes a triad with #178bd3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #178bd3
Tints & shades
Harmonies
Contrast
| #178bd3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.7:1 | fail | pass | fail | |
Aaon black | 5.67:1 | 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 #178bd3 as the background.
Brands using this color
Fonts for this mood
#178bd3 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 #178bd3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/178bd3-9cb0c4-df4e5d-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