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Firm Kusumbha

#870370
Notes

Firm Kusumbha (#870370) 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 (310°, 96%, 27%) 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
#870370
RGB
rgb(135, 3, 112)
HSL
hsl(310, 96%, 27%)
HWB
hwb(310 1% 47%)
OKLCH
oklch(42.4% 0.184 338.0)
P3
color(display-p3 0.4839 0.0927 0.4259)
HSV
hsv(310, 98%, 53%)
LAB
lab(30.37% 57.41 -25.32)
LCH
lch(30.37% 62.75 336.20)
CMYK
cmyk(0%, 98%, 17%, 47%)

Etymology

Firm
adjective

Latin firmus, strong / stable — sharing root with English farm (originally a fixed-yearly-rental). As a color modifier, firm implies a saturated-and-resolute quality where the hue holds its visual position without wavering. Sits at the bold-and-firm end of the grid, parallel to steadfast and unwavering in usage.

Kusumbha
noun

Sanskrit कुसुम्भ, safflower (Carthamus tinctorius) — the floral source of the deep red-pink dye used in Vedic-period Indian textiles and as the kumkuma powder of Hindu and Buddhist ritual. Kusumbha color refers to a freshly pressed Carthamus tinctorius petal-extract on Indian cotton: a saturated, slightly cool deep magenta with the matte finish of safflower-pigment-dyed hand-spun cotton.

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.

#870370
Original
#0f3c72
Protanopia
#414e6d
Deuteranopia
#8f1140
Tritanopia
#272727
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
9.22:1
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
2.28:1

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
##870370
Display P3
Display P3
color(display-p3 0.4839 0.0927 0.4259)
P3 has visible headroomOKLCH chroma 0.184

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

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