#8166E5
Closest named color: Medium Slate Blue (#7B68EE). oklch(60% 0.185 289.4), rgb(129, 102, 229).
Aa
Black text reads best on this color (4.96:1).
About this color
#8166E5 is a medium-dark, vivid purple. In OKLCH its lightness is 60%, its chroma 0.185 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.016 away. Black text reads best on it, at 4.96:1.
| Hue family | Purples |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.96:1 |
| White text | 4.22:1 |
Values
| HEX | #8166E5 |
| RGB | rgb(129, 102, 229) |
| HSL | hsl(253, 71%, 65%) |
| OKLCH | oklch(60% 0.185 289.4) |
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 #8166E5 | 4.22:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #8166E5 | 4.96:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #8166E5 text on white | 4.22:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #8166E5 text on black | 4.96:1 | AA | Lc -32.8 | 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
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4F9
oklch(88.5% 0.051 290.3)
-
Step 300
300
#BFB7F8
oklch(80.9% 0.091 289.8)
-
Step 400
400
#9F8FF4
oklch(70.6% 0.145 289.4)
-
Step 500
500 (this color)
#8166E5
oklch(60% 0.185 289.4)
-
Step 600
600
#7554DE
oklch(55.6% 0.2 289.2)
-
Step 700
700
#6343C1
oklch(49.1% 0.187 289.4)
-
Step 800
800
#51389C
oklch(42.7% 0.155 289.7)
-
Step 900
900
#42327C
oklch(37.7% 0.12 289.3)
-
Step 950
950
#261E49
oklch(27% 0.077 288.7)
#8166E5 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) | #1E7EE9 | 0.108 |
| Deuteranopia (no green cones) | #2278E2 | 0.105 |
| Tritanopia (no blue cones) | #63829C | 0.152 |
| Achromatopsia (no color) | #7B7B7B | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8166E5
#8166E5
oklch(60% 0.185 289.4)
- #868600
#868600
oklch(60% 0.131 109.8)
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 #8166E5, closest first.
No curated palette has a color within ΔE 0.04 of #8166E5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.016
- Purpley #8756E4 ΔE 0.035
- Medium Purple #9370DB ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.055
- Cornflower #6A79F7 ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.059
- Lighter Purple #A55AF4 ΔE 0.067
Use #8166E5 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.