#663B5D
Closest named color: Brownish Purple (#76424E). oklch(41.7% 0.078 335), rgb(102, 59, 93).
Aa
White text reads best on this color (8.94:1).
About this color
#663B5D is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.078 and its hue 335°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.049 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.078) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #663B5D |
| RGB | rgb(102, 59, 93) |
| HSL | hsl(313, 27%, 32%) |
| OKLCH | oklch(41.7% 0.078 335) |
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 #663B5D | 8.94:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #663B5D | 2.34:1 | Fails | Lc 13.7 | Not readable |
| #663B5D text on white | 8.94:1 | AAA | Lc 90.3 | Preferred for body text |
| #663B5D text on black | 2.34:1 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#F0E7ED
oklch(93.7% 0.013 337.5)
-
Step 200
200
#E4D3E0
oklch(88.4% 0.026 333.8)
-
Step 300
300
#D4B6CC
oklch(80.9% 0.045 335.5)
-
Step 400
400
#BE90B3
oklch(70.8% 0.073 335.1)
-
Step 500
500
#AD74A0
oklch(63.2% 0.093 335.2)
-
Step 600
600
#975B8B
oklch(55.5% 0.102 334.5)
-
Step 700
700
#814B76
oklch(49.1% 0.094 334.8)
-
Step 800
800 (this color)
#663B5D
oklch(41.7% 0.078 335)
-
Step 900
900
#55354E
oklch(37.7% 0.06 335)
-
Step 950
950
#321F2E
oklch(27% 0.039 334.4)
#663B5D 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) | #3B465E | 0.078 |
| Deuteranopia (no green cones) | #464C5C | 0.071 |
| Tritanopia (no blue cones) | #6A3D48 | 0.038 |
| Achromatopsia (no color) | #494949 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663B5D
#663B5D
oklch(41.7% 0.078 335)
- #235939
#235939
oklch(41.8% 0.079 154.8)
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 #663B5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.049
- Purple Brown #673A3F ΔE 0.050
- Dusty Grape #545775 ΔE 0.081
- Dark Mauve #874C62 ΔE 0.082
- Dusk #4E5481 ΔE 0.085
- Velvet #750851 ΔE 0.087
- Grape Purple #5D1451 ΔE 0.090
- Twilight #4E518B ΔE 0.091
Use #663B5D 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.