#663D57
Closest named color: Purple Brown (#673A3F). oklch(41.8% 0.068 341.9), rgb(102, 61, 87).
Aa
White text reads best on this color (8.86:1).
About this color
#663D57 is a dark, muted purple. In OKLCH its lightness is 42%, its chroma 0.068 and its hue 342°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.038 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.37:1 |
| White text | 8.86:1 |
Values
| HEX | #663D57 |
| RGB | rgb(102, 61, 87) |
| HSL | hsl(322, 25%, 32%) |
| OKLCH | oklch(41.8% 0.068 341.9) |
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 #663D57 | 8.86:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #663D57 | 2.37:1 | Fails | Lc 13.8 | Not readable |
| #663D57 text on white | 8.86:1 | AAA | Lc 90.1 | Preferred for body text |
| #663D57 text on black | 2.37:1 | Fails | Lc -12.1 | 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
#E4D4DD
oklch(88.5% 0.021 342.6)
-
Step 300
300
#D4B7C8
oklch(80.9% 0.04 342)
-
Step 400
400
#BD91AC
oklch(70.6% 0.064 341.5)
-
Step 500
500
#AC7697
oklch(63.1% 0.081 342.4)
-
Step 600
600
#975E82
oklch(55.6% 0.089 342)
-
Step 700
700
#814D6E
oklch(49.1% 0.083 342)
-
Step 800
800 (this color)
#663D57
oklch(41.8% 0.068 341.9)
-
Step 900
900
#55364A
oklch(37.7% 0.054 341)
-
Step 950
950
#32202B
oklch(27% 0.033 342.3)
#663D57 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) | #3F4658 | 0.071 |
| Deuteranopia (no green cones) | #494C56 | 0.065 |
| Tritanopia (no blue cones) | #6B3D46 | 0.030 |
| Achromatopsia (no color) | #4A4A4A | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D57
#663D57
oklch(41.8% 0.068 341.9)
- #245841
#245841
oklch(41.8% 0.068 162.2)
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 #663D57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.038
- Brownish Purple #76424E ΔE 0.040
- Dark Mauve #874C62 ΔE 0.079
- Dusty Grape #545775 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.087
- Dusk #4E5481 ΔE 0.087
- Velvet #750851 ΔE 0.094
- Red Purple #820747 ΔE 0.095
Use #663D57 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.