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Sure Forsythia

#dde28a
Notes

Sure Forsythia (#DDE28A) is a soft yellow with a warm character. It leans warm, pulling light toward red, orange, and yellow. Naturally inviting, it suits editorial and hospitality contexts. Its HSL profile (63°, 60%, 71%) places it in the balanced band at a light lightness. It works as a background wash, large-area fill, or soft illustration tone. Add a darker ink of the same hue when you need type over it. For a confident two-color system, pair it with its complementary blue. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#dde28a
RGB
rgb(221, 226, 138)
HSL
hsl(63, 60%, 71%)
HWB
hwb(63 54% 11%)
OKLCH
oklch(89.0% 0.111 111.3)
HSV
hsv(63, 39%, 89%)
LAB
lab(87.78% -14.61 42.42)
LCH
lch(87.78% 44.87 109.00)
CMYK
cmyk(2%, 0%, 39%, 11%)

Etymology

Sure
adjective

Old French seur, certain — used as a color modifier since the medieval period for hues that read as confident and stable. Sure red, sure blue: moderate saturation combined with optical commitment. Sits at the crisp-bucket center alongside steady and true.

Forsythia
noun

Forsythia × intermedia, the East Asian shrub naturalized in European gardens — and the bright yellow flowers that cover bare branches in early spring before the leaves emerge. The color refers to a fresh Forsythia bloom in March: a saturated, slightly red-shifted bright yellow with the matte finish of small four-petaled flowers covering an entire shrub.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#dde28a
Original
#eedb83
Protanopia
#efdd8e
Deuteranopia
#e8d8cc
Tritanopia
#dbdbdb
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon White
1.37:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
15.32:1

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