#661C58
Closest named color: Grape Purple (#5D1451). oklch(36.9% 0.128 336.4), rgb(102, 28, 88).
Aa
White text reads best on this color (11.21:1).
About this color
#661C58 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.128 and its hue 336°. Its hue sits on the warm side of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.027 away. White text reads best on it, at 11.21:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.128) |
| Temperature | warm |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.87:1 |
| White text | 11.21:1 |
Values
| HEX | #661C58 |
| RGB | rgb(102, 28, 88) |
| HSL | hsl(311, 57%, 25%) |
| OKLCH | oklch(36.9% 0.128 336.4) |
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 #661C58 | 11.21:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #661C58 | 1.87:1 | Fails | Lc 8.8 | Not readable |
| #661C58 text on white | 11.21:1 | AAA | Lc 95.1 | Preferred for body text |
| #661C58 text on black | 1.87:1 | Fails | Lc -7.6 | 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 900.
-
Step 50
50
#FBF2F9
oklch(97% 0.013 333)
-
Step 100
100
#F7E3F1
oklch(93.6% 0.028 336.4)
-
Step 200
200
#F1CCE6
oklch(88.4% 0.054 336.9)
-
Step 300
300
#E9A9D8
oklch(80.9% 0.096 336.4)
-
Step 400
400
#DB78C4
oklch(70.7% 0.154 336.4)
-
Step 500
500
#CE50B5
oklch(63.1% 0.195 336.2)
-
Step 600
600
#B92CA1
oklch(55.6% 0.213 336.1)
-
Step 700
700
#9F1B89
oklch(49% 0.198 336.4)
-
Step 800
800
#821B70
oklch(42.8% 0.165 336.4)
-
Step 900
900 (this color)
#661C58
oklch(36.9% 0.128 336.4)
-
Step 950
950
#3E1335
oklch(27% 0.082 336.7)
#661C58 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) | #1D345A | 0.138 |
| Deuteranopia (no green cones) | #363F56 | 0.119 |
| Tritanopia (no blue cones) | #6B2037 | 0.062 |
| Achromatopsia (no color) | #3B3B3B | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661C58
#661C58
oklch(36.9% 0.128 336.4)
- #004D2B
#004D2B
oklch(37% 0.089 156.3)
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 #661C58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.027
- Rich Purple #720058 ΔE 0.035
- Velvet #750851 ΔE 0.037
- Merlot #730039 ΔE 0.061
- Red Purple #820747 ΔE 0.067
- Plum Purple #4E0550 ΔE 0.070
- Wine #80013F ΔE 0.070
- Deep Violet #490648 ΔE 0.082
Use #661C58 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.