Color
#2103ab
#2103abrgb(33, 3, 171)hsl(251, 97%, 34%)oklch(0.349 0.223 271.4)Colors that go with #2103ab
Blue, Charcoal and Cobalt 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.
Blue #0000ff
shipped4 real palettes, including Pepsi's brand system and Pfizer's brand system put Blue beside #2103ab, as the supporting colour.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #2103ab: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #2103ab: 4 real palettes, including Tide's brand system and Purina Pro Plan's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #2103ab in 5 real palettes, including Behance's brand system and Dunkin''s brand system, as the accent.
Midnight Blue #191970
shipped7 real palettes, including Blue Mono and Fintech Trust put Midnight Blue beside #2103ab, as that palette's text colour.
Orange Red #ff4500
shippedOrange Red is paired with #2103ab in 4 real palettes, including Tide's brand system and Intercom's brand system, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #2103ab in 8 real palettes, including Nivea's brand system and Discord's brand system, as the supporting colour.
Steel Blue #4682b4
analogousshippedSteel Blue is #2103ab's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Real palettes that use #2103ab
Tints & shades
Harmonies
Contrast
| #2103ab as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.61:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.67:1 | 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 #2103ab as the background.
Brands using this color
Fonts for this mood
#2103ab 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 #2103ab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/2103ab-a89cc4-dfb34e-281f2d-e9ecf1?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