Palettes / Colors / #151BB8

#151BB8 — Vivid Blue

#151BB8 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 #151BB8 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.

#151BB8 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 #B8B214; it also sits naturally between #146BB8 and #6114B8. 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 72%

Cyan 89% · Magenta 85% · Yellow 0% · Key 28%

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

Previews

CSS code for #151BB8

.text { color: #151BB8; }
.background { background-color: #151BB8; }
.border { border: 3px solid #151BB8; }
.text-rgb { color: rgb(21, 27, 184); }
.text-hsl { color: hsl(238, 80%, 40%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #151BB8; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 27, 184, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #151BB8; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 27, 184, 0.8); }

HTML: <p style="color:#151BB8">Text here</p> · <div style="background-color:#151BB8">Div content here</div>

Shades of #151BB8

Tints of #151BB8

Tones of #151BB8

Color harmonies

Complementary — #B8B214:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #151BB8: #FFFFFF.

Semi-transparent (opacity) text on #151BB8

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 #151BB8 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 #151BB8 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

← #151BB7  ·  #151BB9 →

Frequently asked questions

What color is #151BB8?

#151BB8 is Vivid Blue, a blue color (RGB 21, 27, 184). Its closest standard named color is DarkBlue.

What is the RGB and HSL of #151BB8?

#151BB8 is RGB 21, 27, 184 — HSL 238°, 80%, 40% — CMYK 89%, 85%, 0%, 28%.

What colors go with #151BB8?

Its complement is #B8B214; analogous partners are #146BB8 and #6114B8. It also appears in 6+ palettes in our collection.

Can I use #151BB8 for text?

White text on #151BB8 has a contrast ratio of 11.17:1 (passes WCAG AA); black text gives 1.88:1.