#8166EB
Closest named color: Medium Slate Blue (#7B68EE). oklch(60.4% 0.192 288.6), rgb(129, 102, 235).
Aa
Black text reads best on this color (5.03:1).
About this color
#8166EB is a medium-dark, vivid purple. In OKLCH its lightness is 60%, its chroma 0.192 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.011 away. Black text reads best on it, at 5.03:1.
| Hue family | Purples |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 5.03:1 |
| White text | 4.17:1 |
Values
| HEX | #8166EB |
| RGB | rgb(129, 102, 235) |
| HSL | hsl(252, 77%, 66%) |
| OKLCH | oklch(60.4% 0.192 288.6) |
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 #8166EB | 4.17:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #8166EB | 5.03:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #8166EB text on white | 4.17:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #8166EB text on black | 5.03:1 | AA | Lc -33.3 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D7D4FA
oklch(88.4% 0.052 288.9)
-
Step 300
300
#BEB7FA
oklch(80.9% 0.094 288.9)
-
Step 400
400
#9E8FF8
oklch(70.7% 0.15 288.5)
-
Step 500
500 (this color)
#8166EB
oklch(60.4% 0.192 288.6)
-
Step 600
600
#7452E3
oklch(55.6% 0.209 288.5)
-
Step 700
700
#6241C5
oklch(49.1% 0.194 288.6)
-
Step 800
800
#50379F
oklch(42.7% 0.16 288.8)
-
Step 900
900
#42317F
oklch(37.8% 0.126 288.9)
-
Step 950
950
#261E4A
oklch(27.1% 0.079 288.4)
#8166EB 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) | #0A7FEF | 0.113 |
| Deuteranopia (no green cones) | #1179E8 | 0.110 |
| Tritanopia (no blue cones) | #60849F | 0.159 |
| Achromatopsia (no color) | #7C7C7C | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8166EB
#8166EB
oklch(60.4% 0.192 288.6)
- #898700
#898700
oklch(60.5% 0.131 108.7)
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 #8166EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.011
- Purpley #8756E4 ΔE 0.035
- Medium Purple #9370DB ΔE 0.048
- Cornflower #6A79F7 ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.060
- Lighter Purple #A55AF4 ΔE 0.064
- Slate Blue #6A5ACD ΔE 0.065
Use #8166EB 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.