#663F6A
Closest named color: Brownish Purple (#76424E). oklch(43% 0.084 323.6), rgb(102, 63, 106).
Aa
White text reads best on this color (8.45:1).
About this color
#663F6A is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.084 and its hue 324°. 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 8.45:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #663F6A |
| RGB | rgb(102, 63, 106) |
| HSL | hsl(294, 25%, 33%) |
| OKLCH | oklch(43% 0.084 323.6) |
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 #663F6A | 8.45:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #663F6A | 2.48:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #663F6A text on white | 8.45:1 | AAA | Lc 89.0 | Fine for body text |
| #663F6A text on black | 2.48:1 | Fails | Lc -13.3 | 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
#EFE7EF
oklch(93.7% 0.014 325.7)
-
Step 200
200
#E2D3E4
oklch(88.4% 0.028 322.2)
-
Step 300
300
#D1B6D3
oklch(80.8% 0.05 323.9)
-
Step 400
400
#B990BD
oklch(70.7% 0.079 323.4)
-
Step 500
500
#A774AC
oklch(63.1% 0.1 323.6)
-
Step 600
600
#925C98
oklch(55.6% 0.109 323.3)
-
Step 700
700
#7C4B81
oklch(49% 0.101 323.6)
-
Step 800
800 (this color)
#663F6A
oklch(43% 0.084 323.6)
-
Step 900
900
#523555
oklch(37.6% 0.065 323.5)
-
Step 950
950
#301F32
oklch(26.9% 0.042 323)
#663F6A 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) | #3B4A6C | 0.075 |
| Deuteranopia (no green cones) | #454F69 | 0.069 |
| Tritanopia (no blue cones) | #68444F | 0.052 |
| Achromatopsia (no color) | #4D4D4D | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663F6A
#663F6A
oklch(43% 0.084 323.6)
- #315C30
#315C30
oklch(43.1% 0.085 143.5)
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 #663F6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.059
- Dusty Grape #545775 ΔE 0.069
- Purple Brown #673A3F ΔE 0.069
- Dusk #4E5481 ΔE 0.070
- Twilight #4E518B ΔE 0.073
- Dark Mauve #874C62 ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.079
- Light Eggplant #894585 ΔE 0.081
Use #663F6A 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.