Palettes / Colors / #CFEF03

#CFEF03 — Vivid Yellow

#CFEF03 is a yellow color we call Vivid Yellow, closest to the named color Yellow (#FFFF00). It belongs to the yellow family.

Color name

Closest CSS keyword: yellow (#FFFF00) — not an exact match. CSS yellow gives you #FFFF00, a different color; use #CFEF03 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.

#CFEF03 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 #2202ED; it also sits naturally between #ED9702 and #59ED02. 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 81% · Green 94% · Blue 1%

Cyan 13% · Magenta 0% · Yellow 99% · Key 6%

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

Previews

CSS code for #CFEF03

.text { color: #CFEF03; }
.background { background-color: #CFEF03; }
.border { border: 3px solid #CFEF03; }
.text-rgb { color: rgb(207, 239, 3); }
.text-hsl { color: hsl(68, 98%, 47%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #CFEF03; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(207, 239, 3, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #CFEF03; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(207, 239, 3, 0.8); }

HTML: <p style="color:#CFEF03">Text here</p> · <div style="background-color:#CFEF03">Div content here</div>

Shades of #CFEF03

Tints of #CFEF03

Tones of #CFEF03

Color harmonies

Complementary — #2202ED:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #CFEF03: #000000.

Semi-transparent (opacity) text on #CFEF03

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 #CFEF03 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 #CFEF03 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

← #CFEF02  ·  #CFEF04 →

Frequently asked questions

What color is #CFEF03?

#CFEF03 is Vivid Yellow, a yellow color (RGB 207, 239, 3). Its closest standard named color is Yellow.

What is the RGB and HSL of #CFEF03?

#CFEF03 is RGB 207, 239, 3 — HSL 68°, 98%, 47% — CMYK 13%, 0%, 99%, 6%.

What colors go with #CFEF03?

Its complement is #2202ED; analogous partners are #ED9702 and #59ED02. It also appears in 6+ palettes in our collection.

Can I use #CFEF03 for text?

Black text on #CFEF03 has a contrast ratio of 16.00:1 (passes WCAG AA); white text gives 1.31:1.