#663A55
Closest named color: Purple Brown (#673A3F). oklch(41.2% 0.073 343.2), rgb(102, 58, 85).
Aa
White text reads best on this color (9.12:1).
About this color
#663A55 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.073 and its hue 343°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.037 away. White text reads best on it, at 9.12:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #663A55 |
| RGB | rgb(102, 58, 85) |
| HSL | hsl(323, 28%, 31%) |
| OKLCH | oklch(41.2% 0.073 343.2) |
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 #663A55 | 9.12:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #663A55 | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #663A55 text on white | 9.12:1 | AAA | Lc 90.8 | Preferred for body text |
| #663A55 text on black | 2.30:1 | Fails | Lc -11.5 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#F0E7EC
oklch(93.6% 0.012 342.6)
-
Step 200
200
#E5D3DD
oklch(88.4% 0.024 343)
-
Step 300
300
#D5B6C8
oklch(80.8% 0.043 342.3)
-
Step 400
400
#C090AC
oklch(70.8% 0.069 343.2)
-
Step 500
500
#AF7497
oklch(63.1% 0.087 343.5)
-
Step 600
600
#9A5C82
oklch(55.7% 0.095 343.2)
-
Step 700
700
#834B6E
oklch(49% 0.089 342.8)
-
Step 800
800 (this color)
#663A55
oklch(41.2% 0.073 343.2)
-
Step 900
900
#573549
oklch(37.7% 0.057 344)
-
Step 950
950
#331F2B
oklch(27% 0.037 343.1)
#663A55 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) | #3D4456 | 0.075 |
| Deuteranopia (no green cones) | #484B54 | 0.070 |
| Tritanopia (no blue cones) | #6B3A44 | 0.030 |
| Achromatopsia (no color) | #484848 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A55
#663A55
oklch(41.2% 0.073 343.2)
- #1C573F
#1C573F
oklch(41.1% 0.073 162.9)
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 #663A55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.037
- Brownish Purple #76424E ΔE 0.044
- Dark Mauve #874C62 ΔE 0.084
- Dusty Grape #545775 ΔE 0.086
- Velvet #750851 ΔE 0.087
- Charcoal Grey #3C4142 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.089
- Red Purple #820747 ΔE 0.090
Use #663A55 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.