Color
#155cb2
#155cb2rgb(21, 92, 178)hsl(213, 79%, 39%)oklch(0.483 0.152 256.4)Colors that go with #155cb2
Crimson, Medium Sea Green and Midnight Blue 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.
Crimson #dc143c
triadicshippedCrimson completes a triad with #155cb2 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #155cb2 in 4 real palettes, including Fintech Trust and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #155cb2 in 5 real palettes, including Open House and Blue Mono, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Slate Gray #708090
shippedSlate Gray is paired with #155cb2 in 5 real palettes, including Campus and Ink & Paper, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
complementarySienna sits directly opposite #155cb2 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #155cb2 in 3 real palettes, including Open House and Dusk, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #155cb2: softer than #000 and cool enough to feel like part of the same palette.
Taupe #483c32
shippedTaupe is paired with #155cb2 in 3 real palettes, including Loom's brand system and Dusk, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #155cb2
Tints & shades
Harmonies
Contrast
| #155cb2 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.55:1 | pass | pass | fail |
|
Aaon black | 3.21:1 | 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 #155cb2 as the background.
Brands using this color
Fonts for this mood
#155cb2 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 #155cb2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/155cb2-9ca9c4-df584e-1f202d-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