#663361
Closest named color: Purple Brown (#673A3F). oklch(40.5% 0.097 330.9), rgb(102, 51, 97).
Aa
White text reads best on this color (9.49:1).
About this color
#663361 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.097 and its hue 331°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.066 away. White text reads best on it, at 9.49:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #663361 |
| RGB | rgb(102, 51, 97) |
| HSL | hsl(306, 33%, 30%) |
| OKLCH | oklch(40.5% 0.097 330.9) |
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 #663361 | 9.49:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #663361 | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #663361 text on white | 9.49:1 | AAA | Lc 91.7 | Preferred for body text |
| #663361 text on black | 2.21:1 | Fails | Lc -10.7 | 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
#F9F4F8
oklch(97.2% 0.007 332.1)
-
Step 100
100
#F1E6EF
oklch(93.6% 0.017 331.6)
-
Step 200
200
#E6D2E3
oklch(88.5% 0.032 330.7)
-
Step 300
300
#D7B4D2
oklch(81% 0.057 330.9)
-
Step 400
400
#C28CBB
oklch(70.8% 0.091 331)
-
Step 500
500
#B16EAA
oklch(63.1% 0.116 330.6)
-
Step 600
600
#9C5595
oklch(55.6% 0.126 330.8)
-
Step 700
700
#85457F
oklch(49.1% 0.117 330.7)
-
Step 800
800 (this color)
#663361
oklch(40.5% 0.097 330.9)
-
Step 900
900
#583254
oklch(37.8% 0.075 330.8)
-
Step 950
950
#341D31
oklch(27% 0.049 331.6)
#663361 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) | #314163 | 0.096 |
| Deuteranopia (no green cones) | #3F485F | 0.087 |
| Tritanopia (no blue cones) | #6A3745 | 0.053 |
| Achromatopsia (no color) | #464646 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663361
#663361
oklch(40.5% 0.097 330.9)
- #14572C
#14572C
oklch(40.4% 0.097 150.9)
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 #663361, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.066
- Brownish Purple #76424E ΔE 0.069
- Velvet #750851 ΔE 0.070
- Grape Purple #5D1451 ΔE 0.071
- Rich Purple #720058 ΔE 0.075
- Red Purple #820747 ΔE 0.083
- Dark Slate Blue #483D8B ΔE 0.089
- Wine #80013F ΔE 0.089
Use #663361 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.