#663E57
Closest named color: Purple Brown (#673A3F). oklch(42% 0.066 342.3), rgb(102, 62, 87).
Aa
White text reads best on this color (8.78:1).
About this color
#663E57 is a dark, muted purple. In OKLCH its lightness is 42%, its chroma 0.066 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 8.78:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.39:1 |
| White text | 8.78:1 |
Values
| HEX | #663E57 |
| RGB | rgb(102, 62, 87) |
| HSL | hsl(323, 24%, 32%) |
| OKLCH | oklch(42% 0.066 342.3) |
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 #663E57 | 8.78:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #663E57 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #663E57 text on white | 8.78:1 | AAA | Lc 89.9 | Fine for body text |
| #663E57 text on black | 2.39:1 | Fails | Lc -12.3 | 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
#D3B7C8
oklch(80.8% 0.039 341)
-
Step 400
400
#BD92AB
oklch(70.8% 0.062 343)
-
Step 500
500
#AB7697
oklch(63% 0.08 341.8)
-
Step 600
600
#965E81
oklch(55.5% 0.087 342.3)
-
Step 700
700
#804E6D
oklch(49.1% 0.08 342.6)
-
Step 800
800 (this color)
#663E57
oklch(42% 0.066 342.3)
-
Step 900
900
#553649
oklch(37.6% 0.053 342.5)
-
Step 950
950
#32202B
oklch(27% 0.033 342.3)
#663E57 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) | #404758 | 0.069 |
| Deuteranopia (no green cones) | #4A4D56 | 0.063 |
| Tritanopia (no blue cones) | #6B3E47 | 0.028 |
| Achromatopsia (no color) | #4B4B4B | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E57
#663E57
oklch(42% 0.066 342.3)
- #265842
#265842
oklch(41.9% 0.066 162.6)
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 #663E57, 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 0.039
- Dusty Grape #545775 ΔE 0.077
- Dark Mauve #874C62 ΔE 0.078
- Dusk #4E5481 ΔE 0.086
- Charcoal Grey #3C4142 ΔE 0.086
- Twilight #4E518B ΔE 0.095
- YInMn Blue #415A77 ΔE 0.096
Use #663E57 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.