Palettes / Colors / #155DBC

#155DBC — Vivid Blue

#155DBC is a blue color we call Vivid Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

#155DBC 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 #BC7415; it also sits naturally between #15B1BC and #2015BC. 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 8% · Green 36% · Blue 74%

Cyan 89% · Magenta 51% · Yellow 0% · Key 26%

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

Previews

CSS code for #155DBC

.text { color: #155DBC; }
.background { background-color: #155DBC; }
.border { border: 3px solid #155DBC; }
.text-rgb { color: rgb(21, 93, 188); }
.text-hsl { color: hsl(214, 80%, 41%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #155DBC; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 93, 188, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #155DBC; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 93, 188, 0.8); }

HTML: <p style="color:#155DBC">Text here</p> · <div style="background-color:#155DBC">Div content here</div>

Shades of #155DBC

Tints of #155DBC

Tones of #155DBC

Color harmonies

Complementary — #BC7415:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #155DBC: #FFFFFF.

How #155DBC 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 #155DBC 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

← #155DBB  ·  #155DBD →

Frequently asked questions

What color is #155DBC?

#155DBC is Vivid Blue, a blue color (RGB 21, 93, 188). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #155DBC?

#155DBC is RGB 21, 93, 188 — HSL 214°, 80%, 41% — CMYK 89%, 51%, 0%, 26%.

What colors go with #155DBC?

Its complement is #BC7415; analogous partners are #15B1BC and #2015BC. It also appears in 6+ palettes in our collection.

Can I use #155DBC for text?

White text on #155DBC has a contrast ratio of 6.32:1 (passes WCAG AA); black text gives 3.32:1.