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Sterile Brood Mint

#397570
Notes

Sterile Brood Mint (#397570) is a deep cyan with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (175°, 34%, 34%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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
#397570
RGB
rgb(57, 117, 112)
HSL
hsl(175, 34%, 34%)
HWB
hwb(175 22% 54%)
OKLCH
oklch(52.1% 0.063 188.3)
P3
color(display-p3 0.2833 0.4533 0.4380)
HSV
hsv(175, 51%, 46%)
LAB
lab(45.31% -20.79 -3.24)
LCH
lch(45.31% 21.04 188.86)
CMYK
cmyk(51%, 0%, 4%, 54%)

Etymology

Sterile
adjective

Latin sterilis, barren / not-fertile — sharing root with Greek steiros (barren). As a color modifier, sterile implies a clear-and-medical-clean-and-stripped quality, the crisp color of operating-theater surgical-environment white-and-stainless-steel surfaces. Sits at the crisp-and-clean end of the grid, parallel to sanitary and hygienic in usage.

Brood
modifier

Old English brōd, young-of-birds-or-to-ponder. As a color modifier, brood implies a hen-and-pondering-and-darkly-thinking quality, the visual register of Heathcliff-and-Hamlet-brood hand-hen-and-pondering-and-darkly-thinking Heathcliff-and-Hamlet-and-Byronic-hero brooded-and-pondering-and-darkly-thinking surfaces under Heathcliff-and-Hamlet-and-Byronic-hero stormy-and-overcast-and-introspective Yorkshire-moor-light. Sits at the modifier-and-mood end of the grid, parallel to mope and sigh in usage.

Mint
noun

The genus Mentha — peppermint, spearmint, apple mint, water mint — the cooling herb whose menthol gives it that quality at the molecular level. The color refers to fresh peppermint leaves before drying: a clean, slightly cool green with the matte finish of trichome-rich leaf surface. Lighter than basil, cooler than parsley, with the mojito-and-Pimm's association of a herb tied to summer drinks across two continents.

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.

#397570
Original
#6f7070
Protanopia
#656871
Deuteranopia
#177873
Tritanopia
#686868
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).
AAon White
5.31:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.95:1

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
##397570
Display P3
Display P3
color(display-p3 0.2833 0.4533 0.4380)
Inside sRGBOKLCH chroma 0.063

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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