#663367
Closest named color: Grape Purple (#5D1451). oklch(40.8% 0.104 326.6), rgb(102, 51, 103).
Aa
White text reads best on this color (9.39:1).
About this color
#663367 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.104 and its hue 327°. 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 9.39:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #663367 |
| RGB | rgb(102, 51, 103) |
| HSL | hsl(299, 34%, 30%) |
| OKLCH | oklch(40.8% 0.104 326.6) |
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 #663367 | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #663367 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #663367 text on white | 9.39:1 | AAA | Lc 91.4 | Preferred for body text |
| #663367 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
#E6D2E5
oklch(88.6% 0.034 327.4)
-
Step 300
300
#D6B4D6
oklch(81% 0.06 326.1)
-
Step 400
400
#C18BC1
oklch(70.7% 0.098 326.5)
-
Step 500
500
#B06DB1
oklch(63.1% 0.124 326.4)
-
Step 600
600
#9B549C
oklch(55.6% 0.134 326.7)
-
Step 700
700
#844486
oklch(49.1% 0.125 326.1)
-
Step 800
800 (this color)
#663367
oklch(40.8% 0.104 326.6)
-
Step 900
900
#573158
oklch(37.6% 0.08 326.1)
-
Step 950
950
#331D34
oklch(27% 0.051 325.4)
#663367 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) | #2E4269 | 0.100 |
| Deuteranopia (no green cones) | #3D4965 | 0.090 |
| Tritanopia (no blue cones) | #693948 | 0.060 |
| Achromatopsia (no color) | #464646 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663367
#663367
oklch(40.8% 0.104 326.6)
- #1A5825
#1A5825
oklch(40.8% 0.103 146.5)
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 #663367, 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 0.073
- Rich Purple #720058 ΔE 0.075
- Brownish Purple #76424E ΔE 0.076
- Purple Brown #673A3F ΔE 0.076
- Dark Slate Blue #483D8B ΔE 0.082
- Rebecca Purple #663399 ΔE 0.083
- Red Purple #820747 ΔE 0.088
Use #663367 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.