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Certain Drosera

#870b62
Notes

Certain Drosera (#870B62) is a deep magenta with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (318°, 85%, 29%) places it in the highly saturated band at a dark 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#870b62
RGB
rgb(135, 11, 98)
HSL
hsl(318, 85%, 29%)
HWB
hwb(318 4% 47%)
OKLCH
oklch(42.0% 0.171 344.9)
HSV
hsv(318, 92%, 53%)
LAB
lab(30.09% 54.35 -16.73)
LCH
lch(30.09% 56.86 342.89)
CMYK
cmyk(0%, 92%, 27%, 47%)

Etymology

Certain
adjective

Latin certus, fixed / sure — sharing root with English concern and certify. As a color modifier, certain implies a saturated-and-unambiguous quality where the hue declares its character without hesitation. Sits at the bold-and-confident end of the grid, parallel to assured and decisive in usage.

Drosera
noun

Cosmopolitan sundew genus — particularly the Drosera capensis (Cape sundew) whose deep-magenta glandular-tentacle-tipped leaves are coated in iridescent dewdrops that capture insect prey. Drosera color refers to a fully developed Drosera capensis glandular-leaf in raking light: a saturated, slightly cool deep magenta with the iridescent satin finish of glandular-tentacle dewdrops against pigmented leaf substrate. The Greek droserós means dewy.

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

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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.

#870b62
Original
#213a64
Protanopia
#484e5f
Deuteranopia
#910739
Tritanopia
#2c2c2c
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).
AAAon White
9.32:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.25:1

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