Palettes / Colors / #166BB8

#166BB8 — Vivid Blue

#166BB8 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 #166BB8 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.

#166BB8 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 #B76315; it also sits naturally between #15B7B4 and #1518B7. 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 42% · Blue 72%

Cyan 88% · Magenta 42% · Yellow 0% · Key 28%

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

Previews

CSS code for #166BB8

.text { color: #166BB8; }
.background { background-color: #166BB8; }
.border { border: 3px solid #166BB8; }
.text-rgb { color: rgb(22, 107, 184); }
.text-hsl { color: hsl(209, 79%, 40%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #166BB8; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(22, 107, 184, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #166BB8; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(22, 107, 184, 0.8); }

HTML: <p style="color:#166BB8">Text here</p> · <div style="background-color:#166BB8">Div content here</div>

Shades of #166BB8

Tints of #166BB8

Tones of #166BB8

Color harmonies

Complementary — #B76315:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #166BB8: #FFFFFF.

Semi-transparent (opacity) text on #166BB8

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 #166BB8 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 #166BB8 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

← #166BB7  ·  #166BB9 →

Frequently asked questions

What color is #166BB8?

#166BB8 is Vivid Blue, a blue color (RGB 22, 107, 184). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #166BB8?

#166BB8 is RGB 22, 107, 184 — HSL 209°, 79%, 40% — CMYK 88%, 42%, 0%, 28%.

What colors go with #166BB8?

Its complement is #B76315; analogous partners are #15B7B4 and #1518B7. It also appears in 6+ palettes in our collection.

Can I use #166BB8 for text?

White text on #166BB8 has a contrast ratio of 5.48:1 (passes WCAG AA); black text gives 3.83:1.