#663368
Closest named color: Grape Purple (#5D1451). oklch(40.9% 0.105 325.9), rgb(102, 51, 104).
Aa
White text reads best on this color (9.38:1).
About this color
#663368 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.105 and its hue 326°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.073 away. White text reads best on it, at 9.38:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #663368 |
| RGB | rgb(102, 51, 104) |
| HSL | hsl(298, 34%, 30%) |
| OKLCH | oklch(40.9% 0.105 325.9) |
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 #663368 | 9.38:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #663368 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #663368 text on white | 9.38:1 | AAA | Lc 91.3 | Preferred for body text |
| #663368 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#F8F4F8
oklch(97.1% 0.007 325.6)
-
Step 100
100
#F0E6F0
oklch(93.6% 0.017 325.7)
-
Step 200
200
#E5D2E5
oklch(88.5% 0.033 325.9)
-
Step 300
300
#D6B3D6
oklch(80.8% 0.062 326.1)
-
Step 400
400
#C08BC2
oklch(70.7% 0.098 325.3)
-
Step 500
500
#B06DB2
oklch(63.1% 0.125 325.9)
-
Step 600
600
#9B549D
oklch(55.7% 0.135 326.2)
-
Step 700
700
#844487
oklch(49.2% 0.126 325.6)
-
Step 800
800 (this color)
#663368
oklch(40.9% 0.105 325.9)
-
Step 900
900
#573159
oklch(37.7% 0.081 325.2)
-
Step 950
950
#331D34
oklch(27% 0.051 325.4)
#663368 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) | #2D426A | 0.101 |
| Deuteranopia (no green cones) | #3C4966 | 0.091 |
| Tritanopia (no blue cones) | #683948 | 0.061 |
| Achromatopsia (no color) | #464646 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663368
#663368
oklch(40.9% 0.105 325.9)
- #1A5824
#1A5824
oklch(40.8% 0.104 146.1)
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 #663368, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.073
- Velvet #750851 ΔE 0.074
- Rich Purple #720058 ΔE 0.076
- Brownish Purple #76424E ΔE 0.077
- Purple Brown #673A3F ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.081
- Rebecca Purple #663399 ΔE 0.082
- Red Purple #820747 ΔE 0.088
Use #663368 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.