Palettes / Colors / #151DF4

#151DF4 — Vivid Blue

#151DF4 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 #151DF4 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.

#151DF4 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 #F4ED15; it also sits naturally between #158CF4 and #7D15F4. 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 96%

Cyan 91% · Magenta 88% · Yellow 0% · Key 4%

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

Previews

CSS code for #151DF4

.text { color: #151DF4; }
.background { background-color: #151DF4; }
.border { border: 3px solid #151DF4; }
.text-rgb { color: rgb(21, 29, 244); }
.text-hsl { color: hsl(238, 91%, 52%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #151DF4; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 29, 244, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #151DF4; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 29, 244, 0.8); }

HTML: <p style="color:#151DF4">Text here</p> · <div style="background-color:#151DF4">Div content here</div>

Shades of #151DF4

Tints of #151DF4

Tones of #151DF4

Color harmonies

Complementary — #F4ED15:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #151DF4: #FFFFFF.

Semi-transparent (opacity) text on #151DF4

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 #151DF4 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 #151DF4 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

← #151DF3  ·  #151DF5 →

Frequently asked questions

What color is #151DF4?

#151DF4 is Vivid Blue, a blue color (RGB 21, 29, 244). Its closest standard named color is Blue.

What is the RGB and HSL of #151DF4?

#151DF4 is RGB 21, 29, 244 — HSL 238°, 91%, 52% — CMYK 91%, 88%, 0%, 4%.

What colors go with #151DF4?

Its complement is #F4ED15; analogous partners are #158CF4 and #7D15F4. It also appears in 6+ palettes in our collection.

Can I use #151DF4 for text?

White text on #151DF4 has a contrast ratio of 8.35:1 (passes WCAG AA); black text gives 2.51:1.