Palettes / Colors / #151DEF

#151DEF — Vivid Blue

#151DEF is a blue color we call Vivid Blue, closest to the named color Blue (#0000FF). It belongs to the blue family.

Color name

Closest CSS keyword: blue (#0000FF) — not an exact match. CSS blue gives you #0000FF, a different color; use #151DEF 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.

#151DEF 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 #EFE815; it also sits naturally between #1589EF and #7B15EF. 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 94%

Cyan 91% · Magenta 88% · Yellow 0% · Key 6%

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

Previews

CSS code for #151DEF

.text { color: #151DEF; }
.background { background-color: #151DEF; }
.border { border: 3px solid #151DEF; }
.text-rgb { color: rgb(21, 29, 239); }
.text-hsl { color: hsl(238, 87%, 51%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #151DEF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 29, 239, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #151DEF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 29, 239, 0.8); }

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

Shades of #151DEF

Tints of #151DEF

Tones of #151DEF

Color harmonies

Complementary — #EFE815:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #151DEF: #FFFFFF.

Semi-transparent (opacity) text on #151DEF

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 #151DEF 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 #151DEF 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

← #151DEE  ·  #151DF0 →

Frequently asked questions

What color is #151DEF?

#151DEF is Vivid Blue, a blue color (RGB 21, 29, 239). Its closest standard named color is Blue.

What is the RGB and HSL of #151DEF?

#151DEF is RGB 21, 29, 239 — HSL 238°, 87%, 51% — CMYK 91%, 88%, 0%, 6%.

What colors go with #151DEF?

Its complement is #EFE815; analogous partners are #1589EF and #7B15EF. It also appears in 6+ palettes in our collection.

Can I use #151DEF for text?

White text on #151DEF has a contrast ratio of 8.56:1 (passes WCAG AA); black text gives 2.45:1.