Glacier
Open in tool →Three blues from ice to deep water on a pale surface — a monochromatic winter set with real depth.
Color
#0a3f80
#0a3f80
hex
#0a3f80rgb
rgb(10, 63, 128)hsl
hsl(213, 86%, 27%)oklch
oklch(0.376 0.122 256.8)Closest name: Aegean Blue (#1b416f)Relative luminance 0.0518
Colors that go with #0a3f80
Crimson, Steel Blue and 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 #0a3f80 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
analogousshippedSteel Blue is #0a3f80's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #0a3f80, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #0a3f80: 18 real palettes, including Hasbro's brand system and Unilever's brand system, as the supporting colour.
Orange Red #ff4500
shippedOrange Red is paired with #0a3f80 in 5 real palettes, including NASA's brand system and Tide's brand system, as the supporting colour.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #0a3f80: 4 real palettes, including Glacier and First Snow, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #0a3f80 in 11 real palettes, including Nokia's brand system and Confluent's brand system, as the supporting colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #0a3f80: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #0a3f80
Tints & shades
Harmonies
Contrast
| #0a3f80 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.32:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.04:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a3f80 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#0a3f80 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #0a3f80
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #0a3f80 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/0a3f80-9ca9c4-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