Palettes / Colors / #ECFF1F

#ECFF1F — Vivid Yellow

#ECFF1F is a yellow color we call Vivid Yellow, closest to the named color Yellow (#FFFF00). It belongs to the yellow family.

#ECFF1F is a warm yellow color associated with optimism, attention and cheer. 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 #311FFF; it also sits naturally between #FFA21F and #7CFF1F. 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 93% · Green 100% · Blue 12%

Cyan 7% · Magenta 0% · Yellow 88% · Key 0%

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

Previews

CSS code for #ECFF1F

.text { color: #ECFF1F; }
.background { background-color: #ECFF1F; }
.border { border: 3px solid #ECFF1F; }
.text-rgb { color: rgb(236, 255, 31); }
.text-hsl { color: hsl(65, 100%, 56%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #ECFF1F; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(236, 255, 31, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #ECFF1F; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(236, 255, 31, 0.8); }

HTML: <p style="color:#ECFF1F">Text here</p> · <div style="background-color:#ECFF1F">Div content here</div>

Shades of #ECFF1F

Tints of #ECFF1F

Tones of #ECFF1F

Color harmonies

Complementary — #311FFF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #ECFF1F: #000000.

How #ECFF1F 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 #ECFF1F 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

← #ECFF1E  ·  #ECFF20 →

Frequently asked questions

What color is #ECFF1F?

#ECFF1F is Vivid Yellow, a yellow color (RGB 236, 255, 31). Its closest standard named color is Yellow.

What is the RGB and HSL of #ECFF1F?

#ECFF1F is RGB 236, 255, 31 — HSL 65°, 100%, 56% — CMYK 7%, 0%, 88%, 0%.

What colors go with #ECFF1F?

Its complement is #311FFF; analogous partners are #FFA21F and #7CFF1F. It also appears in 6+ palettes in our collection.

Can I use #ECFF1F for text?

Black text on #ECFF1F has a contrast ratio of 18.89:1 (passes WCAG AA); white text gives 1.11:1.