#66366B
Closest named color: Brownish Purple (#76424E). oklch(41.5% 0.102 323.7), rgb(102, 54, 107).
Aa
White text reads best on this color (9.11:1).
About this color
#66366B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.102 and its hue 324°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.075 away. White text reads best on it, at 9.11:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #66366B |
| RGB | rgb(102, 54, 107) |
| HSL | hsl(294, 33%, 32%) |
| OKLCH | oklch(41.5% 0.102 323.7) |
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 #66366B | 9.11:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #66366B | 2.30:1 | Fails | Lc 13.3 | Not readable |
| #66366B text on white | 9.11:1 | AAA | Lc 90.7 | Preferred for body text |
| #66366B text on black | 2.30:1 | Fails | Lc -11.6 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#F0E6F1
oklch(93.6% 0.018 323)
-
Step 200
200
#E4D2E6
oklch(88.4% 0.033 322.8)
-
Step 300
300
#D4B4D7
oklch(80.9% 0.06 323.4)
-
Step 400
400
#BE8CC3
oklch(70.7% 0.096 323.5)
-
Step 500
500
#AD6EB3
oklch(63% 0.123 323.8)
-
Step 600
600
#98559F
oklch(55.5% 0.133 323.6)
-
Step 700
700
#824588
oklch(49.1% 0.124 323.9)
-
Step 800
800 (this color)
#66366B
oklch(41.5% 0.102 323.7)
-
Step 900
900
#563259
oklch(37.7% 0.079 324.2)
-
Step 950
950
#321D34
oklch(26.8% 0.051 323.8)
#66366B 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) | #2F456D | 0.097 |
| Deuteranopia (no green cones) | #3D4A69 | 0.086 |
| Tritanopia (no blue cones) | #683C4B | 0.061 |
| Achromatopsia (no color) | #484848 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66366B
#66366B
oklch(41.5% 0.102 323.7)
- #235924
#235924
oklch(41.4% 0.101 143.8)
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 #66366B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.075
- Dark Slate Blue #483D8B ΔE 0.076
- Rebecca Purple #663399 ΔE 0.078
- Purple Brown #673A3F ΔE 0.078
- Velvet #750851 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.081
- Rich Purple #720058 ΔE 0.083
- Twilight #4E518B ΔE 0.086
Use #66366B 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.