#660D78
Closest named color: Purple (#800080). oklch(37.8% 0.17 319.7), rgb(102, 13, 120).
Aa
White text reads best on this color (11.08:1).
About this color
#660D78 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.170 and its hue 320°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple (#800080), ΔE 0.056 away. White text reads best on it, at 11.08:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Purple (#800080) |
| Black text | 1.89:1 |
| White text | 11.08:1 |
Values
| HEX | #660D78 |
| RGB | rgb(102, 13, 120) |
| HSL | hsl(290, 80%, 26%) |
| OKLCH | oklch(37.8% 0.17 319.7) |
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 #660D78 | 11.08:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #660D78 | 1.89:1 | Fails | Lc 9.8 | Not readable |
| #660D78 text on white | 11.08:1 | AAA | Lc 94.2 | Preferred for body text |
| #660D78 text on black | 1.89:1 | Fails | Lc -8.4 | 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
#FBF2FD
oklch(97.1% 0.017 320.1)
-
Step 100
100
#F5E2FA
oklch(93.5% 0.038 319.2)
-
Step 200
200
#EECBF7
oklch(88.5% 0.07 319.3)
-
Step 300
300
#E5A5F4
oklch(80.9% 0.128 319.8)
-
Step 400
400
#D66EEE
oklch(70.6% 0.204 319.8)
-
Step 500
500
#C939E8
oklch(63% 0.26 319.7)
-
Step 600
600
#B200D1
oklch(55.7% 0.267 319.8)
-
Step 700
700
#9600B1
oklch(49.1% 0.236 319.7)
-
Step 800
800
#7C0092
oklch(42.7% 0.205 319.9)
-
Step 900
900 (this color)
#660D78
oklch(37.8% 0.17 319.7)
-
Step 950
950
#3C0D46
oklch(27.1% 0.107 319.9)
#660D78 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) | #00367B | 0.160 |
| Deuteranopia (no green cones) | #193E76 | 0.151 |
| Tritanopia (no blue cones) | #662846 | 0.103 |
| Achromatopsia (no color) | #3C3C3C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #660D78
#660D78
oklch(37.8% 0.17 319.7)
- #155000
#155000
oklch(37.8% 0.121 139.7)
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 #660D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple #800080 ΔE 0.056
- Rich Purple #720058 ΔE 0.063
- Royal Purple #4B006E ΔE 0.066
- Indigo #4B0082 ΔE 0.068
- Grape Purple #5D1451 ΔE 0.069
- Velvet #750851 ΔE 0.078
- Rebecca Purple #663399 ΔE 0.079
- Dark Magenta #8B008B ΔE 0.083
Use #660D78 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.