Palettes / Colors / #151DBB

#151DBB — Vivid Blue

#151DBB is a blue color we call Vivid Blue, closest to the named color DarkBlue (#00008B). It belongs to the blue family.

Color name

Closest CSS keyword: darkblue (#00008B) — not an exact match. CSS darkblue gives you #00008B, a different color; use #151DBB 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.

#151DBB 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 #BCB415; it also sits naturally between #1571BC and #6015BC. 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 11% · Blue 73%

Cyan 89% · Magenta 84% · Yellow 0% · Key 27%

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

Previews

CSS code for #151DBB

.text { color: #151DBB; }
.background { background-color: #151DBB; }
.border { border: 3px solid #151DBB; }
.text-rgb { color: rgb(21, 29, 187); }
.text-hsl { color: hsl(237, 80%, 41%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #151DBB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 29, 187, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #151DBB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 29, 187, 0.8); }

HTML: <p style="color:#151DBB">Text here</p> · <div style="background-color:#151DBB">Div content here</div>

Shades of #151DBB

Tints of #151DBB

Tones of #151DBB

Color harmonies

Complementary — #BCB415:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #151DBB: #FFFFFF.

Semi-transparent (opacity) text on #151DBB

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 #151DBB 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 #151DBB 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

← #151DBA  ·  #151DBC →

Frequently asked questions

What color is #151DBB?

#151DBB is Vivid Blue, a blue color (RGB 21, 29, 187). Its closest standard named color is DarkBlue.

What is the RGB and HSL of #151DBB?

#151DBB is RGB 21, 29, 187 — HSL 237°, 80%, 41% — CMYK 89%, 84%, 0%, 27%.

What colors go with #151DBB?

Its complement is #BCB415; analogous partners are #1571BC and #6015BC. It also appears in 6+ palettes in our collection.

Can I use #151DBB for text?

White text on #151DBB has a contrast ratio of 10.91:1 (passes WCAG AA); black text gives 1.93:1.