#663C61
Closest named color: Brownish Purple (#76424E). oklch(42% 0.08 331.3), rgb(102, 60, 97).
Aa
White text reads best on this color (8.80:1).
About this color
#663C61 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 331°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.052 away. White text reads best on it, at 8.80:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #663C61 |
| RGB | rgb(102, 60, 97) |
| HSL | hsl(307, 26%, 32%) |
| OKLCH | oklch(42% 0.08 331.3) |
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 #663C61 | 8.80:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #663C61 | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #663C61 text on white | 8.80:1 | AAA | Lc 90.0 | Fine for body text |
| #663C61 text on black | 2.38:1 | Fails | Lc -12.3 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#EFE7EE
oklch(93.6% 0.013 329.6)
-
Step 200
200
#E4D3E1
oklch(88.5% 0.026 331.6)
-
Step 300
300
#D3B6CF
oklch(80.9% 0.047 330.5)
-
Step 400
400
#BC90B6
oklch(70.7% 0.074 331)
-
Step 500
500
#AB74A4
oklch(63.2% 0.095 331.2)
-
Step 600
600
#965B8F
oklch(55.5% 0.105 331.2)
-
Step 700
700
#804B7A
oklch(49.2% 0.097 331.1)
-
Step 800
800 (this color)
#663C61
oklch(42% 0.08 331.3)
-
Step 900
900
#553551
oklch(37.8% 0.063 331.2)
-
Step 950
950
#321F2F
oklch(27% 0.04 332.3)
#663C61 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) | #3B4762 | 0.077 |
| Deuteranopia (no green cones) | #464D60 | 0.071 |
| Tritanopia (no blue cones) | #693F4A | 0.043 |
| Achromatopsia (no color) | #4A4A4A | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663C61
#663C61
oklch(42% 0.08 331.3)
- #275936
#275936
oklch(41.9% 0.08 151.3)
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 #663C61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.052
- Purple Brown #673A3F ΔE 0.056
- Dusty Grape #545775 ΔE 0.077
- Dusk #4E5481 ΔE 0.081
- Dark Mauve #874C62 ΔE 0.081
- Twilight #4E518B ΔE 0.086
- Dark Slate Blue #483D8B ΔE 0.089
- Velvet #750851 ΔE 0.090
Use #663C61 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.