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Animated Bluebird

#21cefd
Notes

Animated Bluebird (#21CEFD) is a true cyan with a neon character. It sits at the high-saturation edge of its family. Use it sparingly, as signage, accent, or highlight against darker surfaces. Its HSL profile (193°, 98%, 56%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#21cefd
RGB
rgb(33, 206, 253)
HSL
hsl(193, 98%, 56%)
HWB
hwb(193 13% 1%)
OKLCH
oklch(79.1% 0.142 222.9)
HSV
hsv(193, 87%, 99%)
LAB
lab(77.01% -24.91 -34.51)
LCH
lch(77.01% 42.56 234.18)
CMYK
cmyk(87%, 19%, 0%, 1%)

Etymology

Animated
adjective

Latin animātus, given-life — past-participle of animāre, derived from anima (soul, breath). As a color modifier, animated implies a saturated-and-life-given quality where the hue carries visual movement-and-vitality. Sits at the bright-and-active end of the grid, parallel to spirited and lively in usage.

Bluebird
noun

The genus Sialia — North American bluebirds — particularly S. sialis (Eastern bluebird), whose males display saturated cobalt-blue plumage with rust-red breasts. The color refers to a male Eastern bluebird in breeding plumage: a saturated, slightly cool deep blue with the matte finish of structurally colored feathers.

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.

#21cefd
Original
#b3c9ff
Protanopia
#98b6fd
Deuteranopia
#00dcdd
Tritanopia
#adadad
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
1.86:1
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
11.31:1

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