#663A64
Closest named color: Brownish Purple (#76424E). oklch(41.8% 0.087 328.6), rgb(102, 58, 100).
Aa
White text reads best on this color (8.92:1).
About this color
#663A64 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 329°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.059 away. White text reads best on it, at 8.92:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #663A64 |
| RGB | rgb(102, 58, 100) |
| HSL | hsl(303, 28%, 31%) |
| OKLCH | oklch(41.8% 0.087 328.6) |
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 #663A64 | 8.92:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #663A64 | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #663A64 text on white | 8.92:1 | AAA | Lc 90.2 | Preferred for body text |
| #663A64 text on black | 2.35:1 | Fails | Lc -12.0 | 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
#F0E7EF
oklch(93.7% 0.014 329.1)
-
Step 200
200
#E4D3E3
oklch(88.5% 0.028 327.6)
-
Step 300
300
#D4B5D1
oklch(80.8% 0.052 329.2)
-
Step 400
400
#BD8FBA
oklch(70.8% 0.081 328.6)
-
Step 500
500
#AC72A9
oklch(63.1% 0.104 328.5)
-
Step 600
600
#975A94
oklch(55.7% 0.112 328.7)
-
Step 700
700
#81497E
oklch(49.1% 0.106 329)
-
Step 800
800 (this color)
#663A64
oklch(41.8% 0.087 328.6)
-
Step 900
900
#553453
oklch(37.7% 0.067 328.9)
-
Step 950
950
#321F31
oklch(27.1% 0.042 328.5)
#663A64 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) | #374666 | 0.084 |
| Deuteranopia (no green cones) | #434C63 | 0.076 |
| Tritanopia (no blue cones) | #693E4A | 0.049 |
| Achromatopsia (no color) | #4A4A4A | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A64
#663A64
oklch(41.8% 0.087 328.6)
- #255931
#255931
oklch(41.7% 0.086 148.9)
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 #663A64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.059
- Purple Brown #673A3F ΔE 0.062
- Dusty Grape #545775 ΔE 0.081
- Dusk #4E5481 ΔE 0.082
- Dark Slate Blue #483D8B ΔE 0.085
- Dark Mauve #874C62 ΔE 0.086
- Twilight #4E518B ΔE 0.086
- Velvet #750851 ΔE 0.086
Use #663A64 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.