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Calm Altair Moss

#b3d899
Notes

Calm Altair Moss (#B3D899) is a soft lime with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (95°, 45%, 72%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b3d899
RGB
rgb(179, 216, 153)
HSL
hsl(95, 45%, 72%)
HWB
hwb(95 60% 15%)
OKLCH
oklch(84.0% 0.093 132.9)
P3
color(display-p3 0.7305 0.8428 0.6241)
HSV
hsv(95, 29%, 85%)
LAB
lab(82.38% -23.40 27.18)
LCH
lch(82.38% 35.87 130.73)
CMYK
cmyk(17%, 0%, 29%, 15%)

Etymology

Calm
adjective

Latin calma, heat of the day — paradoxically drifted in Italian to mean stillness. Used as a color modifier since the seventeenth century for hues that read as untroubled. Calm blue, calm gray: moderate saturation combined with optical quiet. Sits at the crisp-bucket near quiet and steady.

Altair
modifier

Arabic al-nasr-al-tā'ir, the-flying-eagle. As a color modifier, altair implies a fast-spinning-and-summer-triangle quality, the visual register of Aquila-Eagle-and-Summer-Triangle-Altair hand-fast-spinning-and-summer-triangle Aquila-Eagle-and-Summer-Triangle-and-Bortle-1-sky altair-and-fast-spinning-and-summer-triangle surfaces under Aquila-Eagle-and-Summer-Triangle-and-Bortle-1-sky July-and-August-summer-vista white-stellar-light. Sits at the modifier-and-cosmic end of the grid, parallel to vega and deneb in usage.

Moss
noun

Bryophyta — the nonvascular plants that colonized land 470 million years ago, before vascular plants and far before flowers. The color refers to a thick mat of Hypnum or sphagnum on a temperate forest floor: a soft, slightly yellow-shifted green with the velvet texture of millimeter-scale leaves. Dustier than fern, deeper than lichen, with the slow patience of a plant that lives by absorbing rain through its surface.

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.

#b3d899
Original
#ddcf95
Protanopia
#d8cc9c
Deuteranopia
#b4d3c7
Tritanopia
#cccccc
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
1.59:1
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
13.20:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##B3D899
Display P3
Display P3
color(display-p3 0.7305 0.8428 0.6241)
P3 has subtle headroomOKLCH chroma 0.093

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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Canvas