#663C6C
Closest named color: Brownish Purple (#76424E). oklch(42.6% 0.092 322.4), rgb(102, 60, 108).
Aa
White text reads best on this color (8.64:1).
About this color
#663C6C is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.092 and its hue 322°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.066 away. White text reads best on it, at 8.64:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #663C6C |
| RGB | rgb(102, 60, 108) |
| HSL | hsl(293, 29%, 33%) |
| OKLCH | oklch(42.6% 0.092 322.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #663C6C | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #663C6C | 2.42:1 | Fails | Lc 14.5 | Not readable |
| #663C6C text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #663C6C text on black | 2.42:1 | Fails | Lc -12.8 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F8F4F8
oklch(97.1% 0.007 325.6)
-
Step 100
100
#EFE7F0
oklch(93.7% 0.015 322.3)
-
Step 200
200
#E3D3E5
oklch(88.5% 0.03 322.4)
-
Step 300
300
#D2B6D5
oklch(81% 0.053 323)
-
Step 400
400
#BA8FC0
oklch(70.7% 0.085 322.3)
-
Step 500
500
#A972B0
oklch(63.1% 0.11 322.8)
-
Step 600
600
#94599C
oklch(55.6% 0.12 322.6)
-
Step 700
700
#7E4985
oklch(49.1% 0.111 322.8)
-
Step 800
800 (this color)
#663C6C
oklch(42.6% 0.092 322.4)
-
Step 900
900
#533458
oklch(37.7% 0.071 321.8)
-
Step 950
950
#311F33
oklch(27.1% 0.044 323.2)
#663C6C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #36486E | 0.083 |
| Deuteranopia (no green cones) | #414D6B | 0.075 |
| Tritanopia (no blue cones) | #67424F | 0.056 |
| Achromatopsia (no color) | #4C4C4C | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663C6C
#663C6C
oklch(42.6% 0.092 322.4)
- #2E5B2A
#2E5B2A
oklch(42.6% 0.092 142.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #663C6C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.066
- Dusk #4E5481 ΔE 0.074
- Purple Brown #673A3F ΔE 0.074
- Dark Slate Blue #483D8B ΔE 0.075
- Twilight #4E518B ΔE 0.075
- Dusty Grape #545775 ΔE 0.077
- Rebecca Purple #663399 ΔE 0.081
- Light Eggplant #894585 ΔE 0.081
Use #663C6C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.