#663A68
Closest named color: Brownish Purple (#76424E). oklch(42% 0.091 325.5), rgb(102, 58, 104).
Aa
White text reads best on this color (8.86:1).
About this color
#663A68 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 325°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.064 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.37:1 |
| White text | 8.86:1 |
Values
| HEX | #663A68 |
| RGB | rgb(102, 58, 104) |
| HSL | hsl(297, 28%, 32%) |
| OKLCH | oklch(42% 0.091 325.5) |
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 #663A68 | 8.86:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #663A68 | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #663A68 text on white | 8.86:1 | AAA | Lc 90.1 | Preferred for body text |
| #663A68 text on black | 2.37:1 | Fails | Lc -12.2 | 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
#EFE6F0
oklch(93.5% 0.016 322.7)
-
Step 200
200
#E4D3E4
oklch(88.6% 0.029 325.8)
-
Step 300
300
#D3B5D4
oklch(80.9% 0.054 325.1)
-
Step 400
400
#BC8EBE
oklch(70.6% 0.086 325.1)
-
Step 500
500
#AB71AD
oklch(63% 0.11 325.6)
-
Step 600
600
#965999
oklch(55.6% 0.118 325.3)
-
Step 700
700
#804882
oklch(49% 0.111 325.9)
-
Step 800
800 (this color)
#663A68
oklch(42% 0.091 325.5)
-
Step 900
900
#553456
oklch(37.8% 0.07 325.8)
-
Step 950
950
#321E32
oklch(26.9% 0.046 326.8)
#663A68 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) | #36476A | 0.085 |
| Deuteranopia (no green cones) | #414C67 | 0.078 |
| Tritanopia (no blue cones) | #683F4C | 0.053 |
| Achromatopsia (no color) | #4A4A4A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A68
#663A68
oklch(42% 0.091 325.5)
- #285A2C
#285A2C
oklch(42% 0.092 145.3)
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 #663A68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.064
- Purple Brown #673A3F ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.080
- Dusk #4E5481 ΔE 0.080
- Dusty Grape #545775 ΔE 0.081
- Twilight #4E518B ΔE 0.082
- Rebecca Purple #663399 ΔE 0.086
- Light Eggplant #894585 ΔE 0.086
Use #663A68 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.