#8166E0
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.7% 0.178 290.1), rgb(129, 102, 224).
Aa
Black text reads best on this color (4.91:1).
About this color
#8166E0 is a medium-dark, vivid purple. In OKLCH its lightness is 60%, its chroma 0.178 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.023 away. Black text reads best on it, at 4.91:1.
| Hue family | Purples |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #8166E0 |
| RGB | rgb(129, 102, 224) |
| HSL | hsl(253, 66%, 64%) |
| OKLCH | oklch(59.7% 0.178 290.1) |
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 #8166E0 | 4.27:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #8166E0 | 4.91:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #8166E0 text on white | 4.27:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #8166E0 text on black | 4.91:1 | AA | Lc -32.4 | 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
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#BFB7F6
oklch(80.8% 0.088 290.1)
-
Step 400
400
#A090F1
oklch(70.7% 0.139 289.9)
-
Step 500
500 (this color)
#8166E0
oklch(59.7% 0.178 290.1)
-
Step 600
600
#7655DA
oklch(55.5% 0.194 290)
-
Step 700
700
#6444BD
oklch(49% 0.181 290.3)
-
Step 800
800
#513999
oklch(42.6% 0.15 290.1)
-
Step 900
900
#43337A
oklch(37.8% 0.116 290.1)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#8166E0 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) | #277DE4 | 0.105 |
| Deuteranopia (no green cones) | #2C78DD | 0.101 |
| Tritanopia (no blue cones) | #668099 | 0.146 |
| Achromatopsia (no color) | #7A7A7A | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8166E0
#8166E0
oklch(59.7% 0.178 290.1)
- #848500
#848500
oklch(59.6% 0.13 110.3)
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 #8166E0, closest first.
No curated palette has a color within ΔE 0.04 of #8166E0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.023
- Purpley #8756E4 ΔE 0.036
- Medium Purple #9370DB ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.055
- Cornflower #6A79F7 ΔE 0.059
- Amethyst #9B5FC0 ΔE 0.065
Use #8166E0 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.