Color
#135bb9
#135bb9rgb(19, 91, 185)hsl(214, 81%, 40%)oklch(0.486 0.163 257.7)Colors that go with #135bb9
Medium Sea Green, Midnight Blue and Slate Gray 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.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #135bb9 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 #135bb9 in 5 real palettes, including Blue Mono and Open House, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Slate Gray #708090
shippedSlate Gray is paired with #135bb9 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 #135bb9 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 #135bb9 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 #135bb9: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #135bb9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Olive Green #808000
split-complementOlive Green is a split-complement of #135bb9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #135bb9
Tints & shades
Harmonies
Contrast
| #135bb9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.51:1 | pass | pass | fail |
|
Aaon black | 3.22:1 | 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 #135bb9 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#135bb9 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 #135bb9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/135bb9-9ca9c4-df5a4e-1f1f2d-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