Palettes / Colors / #104FBB

#104FBB — Vivid Blue

#104FBB is a blue color we call Vivid Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

Color name

Closest CSS keyword: royalblue (#4169E1) — not an exact match. CSS royalblue gives you #4169E1, a different color; use #104FBB 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.

#104FBB 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 #BC7D10; it also sits naturally between #10A5BC and #2710BC. 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 6% · Green 31% · Blue 73%

Cyan 91% · Magenta 58% · Yellow 0% · Key 27%

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

Previews

CSS code for #104FBB

.text { color: #104FBB; }
.background { background-color: #104FBB; }
.border { border: 3px solid #104FBB; }
.text-rgb { color: rgb(16, 79, 187); }
.text-hsl { color: hsl(218, 84%, 40%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #104FBB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(16, 79, 187, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #104FBB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(16, 79, 187, 0.8); }

HTML: <p style="color:#104FBB">Text here</p> · <div style="background-color:#104FBB">Div content here</div>

Shades of #104FBB

Tints of #104FBB

Tones of #104FBB

Color harmonies

Complementary — #BC7D10:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #104FBB: #FFFFFF.

Semi-transparent (opacity) text on #104FBB

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 #104FBB 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 #104FBB 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

← #104FBA  ·  #104FBC →

Frequently asked questions

What color is #104FBB?

#104FBB is Vivid Blue, a blue color (RGB 16, 79, 187). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #104FBB?

#104FBB is RGB 16, 79, 187 — HSL 218°, 84%, 40% — CMYK 91%, 58%, 0%, 27%.

What colors go with #104FBB?

Its complement is #BC7D10; analogous partners are #10A5BC and #2710BC. It also appears in 6+ palettes in our collection.

Can I use #104FBB for text?

White text on #104FBB has a contrast ratio of 7.35:1 (passes WCAG AA); black text gives 2.86:1.