#663B5F
Closest named color: Brownish Purple (#76424E). oklch(41.8% 0.08 333), rgb(102, 59, 95).
Aa
White text reads best on this color (8.91:1).
About this color
#663B5F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 333°. 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 8.91:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #663B5F |
| RGB | rgb(102, 59, 95) |
| HSL | hsl(310, 27%, 32%) |
| OKLCH | oklch(41.8% 0.08 333) |
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 #663B5F | 8.91:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #663B5F | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #663B5F text on white | 8.91:1 | AAA | Lc 90.2 | Preferred for body text |
| #663B5F 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#F0E7EE
oklch(93.7% 0.013 333)
-
Step 200
200
#E4D3E1
oklch(88.5% 0.026 331.6)
-
Step 300
300
#D4B6CE
oklch(80.9% 0.047 332.8)
-
Step 400
400
#BD90B5
oklch(70.8% 0.074 332.6)
-
Step 500
500
#AC73A2
oklch(63% 0.096 333.1)
-
Step 600
600
#975B8D
oklch(55.6% 0.104 333.2)
-
Step 700
700
#814B78
oklch(49.2% 0.096 333.3)
-
Step 800
800 (this color)
#663B5F
oklch(41.8% 0.08 333)
-
Step 900
900
#553550
oklch(37.7% 0.062 332.5)
-
Step 950
950
#321F2F
oklch(27% 0.04 332.3)
#663B5F 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) | #3A4660 | 0.079 |
| Deuteranopia (no green cones) | #454C5E | 0.072 |
| Tritanopia (no blue cones) | #6A3D48 | 0.042 |
| Achromatopsia (no color) | #4A4A4A | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663B5F
#663B5F
oklch(41.8% 0.08 333)
- #245937
#245937
oklch(41.8% 0.08 153.1)
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 #663B5F, 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 0.053
- Dusty Grape #545775 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.083
- Dusk #4E5481 ΔE 0.084
- Velvet #750851 ΔE 0.087
- Twilight #4E518B ΔE 0.089
- Grape Purple #5D1451 ΔE 0.090
Use #663B5F 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.