#8166DC
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.4% 0.173 290.7), rgb(129, 102, 220).
Aa
Black text reads best on this color (4.86:1).
About this color
#8166DC is a medium-dark, vivid purple. In OKLCH its lightness is 59%, its chroma 0.173 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.029 away. Black text reads best on it, at 4.86:1.
| Hue family | Purples |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #8166DC |
| RGB | rgb(129, 102, 220) |
| HSL | hsl(254, 63%, 63%) |
| OKLCH | oklch(59.4% 0.173 290.7) |
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 #8166DC | 4.31:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #8166DC | 4.86:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #8166DC text on white | 4.31:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #8166DC text on black | 4.86:1 | AA | Lc -32.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F7
oklch(88.4% 0.048 290.6)
-
Step 300
300
#C0B8F4
oklch(81% 0.084 290.5)
-
Step 400
400
#A190EE
oklch(70.7% 0.135 290.8)
-
Step 500
500 (this color)
#8166DC
oklch(59.4% 0.173 290.7)
-
Step 600
600
#7756D7
oklch(55.6% 0.189 290.7)
-
Step 700
700
#6446BA
oklch(49.1% 0.174 290.4)
-
Step 800
800
#523A97
oklch(42.8% 0.145 290.8)
-
Step 900
900
#433378
oklch(37.7% 0.113 290.6)
-
Step 950
950
#271F46
oklch(27.1% 0.07 290.3)
#8166DC 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) | #2D7CE0 | 0.102 |
| Deuteranopia (no green cones) | #3277D9 | 0.097 |
| Tritanopia (no blue cones) | #687F97 | 0.142 |
| Achromatopsia (no color) | #7A7A7A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8166DC
#8166DC
oklch(59.4% 0.173 290.7)
- #838500
#838500
oklch(59.5% 0.131 110.8)
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 #8166DC, closest first.
No curated palette has a color within ΔE 0.04 of #8166DC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.029
- Purpley #8756E4 ΔE 0.038
- Medium Purple #9370DB ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.053
- Deep Lavender #8D5EB7 ΔE 0.060
- Amethyst #9B5FC0 ΔE 0.061
Use #8166DC 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.