#663F69
Closest named color: Brownish Purple (#76424E). oklch(43% 0.083 324.4), rgb(102, 63, 105).
Aa
White text reads best on this color (8.46:1).
About this color
#663F69 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.083 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 0.058 away. White text reads best on it, at 8.46:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.083) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.47:1 |
| White text | 8.46:1 |
Values
| HEX | #663F69 |
| RGB | rgb(102, 63, 105) |
| HSL | hsl(296, 25%, 33%) |
| OKLCH | oklch(43% 0.083 324.4) |
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 #663F69 | 8.46:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #663F69 | 2.47:1 | Fails | Lc 15.0 | Not readable |
| #663F69 text on white | 8.46:1 | AAA | Lc 89.0 | Fine for body text |
| #663F69 text on black | 2.47:1 | Fails | Lc -13.2 | 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
#F8F4F8
oklch(97.1% 0.007 325.6)
-
Step 100
100
#EFE7EF
oklch(93.7% 0.014 325.7)
-
Step 200
200
#E2D3E3
oklch(88.4% 0.027 323.9)
-
Step 300
300
#D1B7D2
oklch(81% 0.047 324.9)
-
Step 400
400
#B990BC
oklch(70.6% 0.078 324.1)
-
Step 500
500
#A774AB
oklch(63% 0.099 324.2)
-
Step 600
600
#925C96
oklch(55.5% 0.107 324.5)
-
Step 700
700
#7C4C80
oklch(49.1% 0.098 324.2)
-
Step 800
800 (this color)
#663F69
oklch(43% 0.083 324.4)
-
Step 900
900
#533555
oklch(37.7% 0.066 324.6)
-
Step 950
950
#301F32
oklch(26.9% 0.042 323)
#663F69 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) | #3B4A6B | 0.075 |
| Deuteranopia (no green cones) | #454F68 | 0.069 |
| Tritanopia (no blue cones) | #68434F | 0.049 |
| Achromatopsia (no color) | #4D4D4D | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663F69
#663F69
oklch(43% 0.083 324.4)
- #315B32
#315B32
oklch(42.9% 0.081 144.5)
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 #663F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.058
- Purple Brown #673A3F ΔE 0.068
- Dusty Grape #545775 ΔE 0.069
- Dusk #4E5481 ΔE 0.070
- Twilight #4E518B ΔE 0.074
- Dark Mauve #874C62 ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.080
- Light Eggplant #894585 ΔE 0.082
Use #663F69 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.