Palettes / Colors / #166EBB

#166EBB — Vivid Blue

#166EBB is a blue color we call Vivid Blue, closest to the named color SteelBlue (#4682B4). It belongs to the blue family.

Color name

Closest CSS keyword: steelblue (#4682B4) — not an exact match. CSS steelblue gives you #4682B4, a different color; use #166EBB when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#166EBB is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #BB6316; it also sits naturally between #16BBB6 and #161BBB. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 9% · Green 43% · Blue 73%

Cyan 88% · Magenta 41% · Yellow 0% · Key 27%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #166EBB

.text { color: #166EBB; }
.background { background-color: #166EBB; }
.border { border: 3px solid #166EBB; }
.text-rgb { color: rgb(22, 110, 187); }
.text-hsl { color: hsl(208, 79%, 41%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #166EBB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(22, 110, 187, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #166EBB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(22, 110, 187, 0.8); }

HTML: <p style="color:#166EBB">Text here</p> · <div style="background-color:#166EBB">Div content here</div>

Shades of #166EBB

Tints of #166EBB

Tones of #166EBB

Color harmonies

Complementary — #BB6316:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #166EBB: #FFFFFF.

Semi-transparent (opacity) text on #166EBB

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #166EBB looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #166EBB rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #166EBA  ·  #166EBC →

Frequently asked questions

What color is #166EBB?

#166EBB is Vivid Blue, a blue color (RGB 22, 110, 187). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #166EBB?

#166EBB is RGB 22, 110, 187 — HSL 208°, 79%, 41% — CMYK 88%, 41%, 0%, 27%.

What colors go with #166EBB?

Its complement is #BB6316; analogous partners are #16BBB6 and #161BBB. It also appears in 6+ palettes in our collection.

Can I use #166EBB for text?

White text on #166EBB has a contrast ratio of 5.27:1 (passes WCAG AA); black text gives 3.98:1.