#8666F0
Closest named color: Medium Slate Blue (#7B68EE). oklch(61.2% 0.199 289.9), rgb(134, 102, 240).
Aa
Black text reads best on this color (5.17:1).
About this color
#8666F0 is a medium-dark, vivid purple. In OKLCH its lightness is 61%, its chroma 0.199 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.018 away. Black text reads best on it, at 5.17:1.
| Hue family | Purples |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 5.17:1 |
| White text | 4.05:1 |
Values
| HEX | #8666F0 |
| RGB | rgb(134, 102, 240) |
| HSL | hsl(254, 82%, 67%) |
| OKLCH | oklch(61.2% 0.199 289.9) |
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 #8666F0 | 4.05:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #8666F0 | 5.17:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #8666F0 text on white | 4.05:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #8666F0 text on black | 5.17:1 | AA | Lc -34.2 | 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
#D8D4FB
oklch(88.5% 0.053 290)
-
Step 300
300
#BFB6FB
oklch(80.8% 0.097 290)
-
Step 400
400
#A08DFA
oklch(70.7% 0.156 289.8)
-
Step 500
500 (this color)
#8666F0
oklch(61.2% 0.199 289.9)
-
Step 600
600
#774FE5
oklch(55.6% 0.215 289.8)
-
Step 700
700
#653EC7
oklch(49.1% 0.2 290.1)
-
Step 800
800
#5235A1
oklch(42.8% 0.165 289.9)
-
Step 900
900
#433080
oklch(37.8% 0.129 289.7)
-
Step 950
950
#271D4B
oklch(27% 0.082 289.8)
#8666F0 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) | #0081F5 | 0.121 |
| Deuteranopia (no green cones) | #0B7BED | 0.118 |
| Tritanopia (no blue cones) | #6685A1 | 0.163 |
| Achromatopsia (no color) | #7E7E7E | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8666F0
#8666F0
oklch(61.2% 0.199 289.9)
- #898A00
#898A00
oklch(61.2% 0.134 110.3)
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 #8666F0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.018
- Purpley #8756E4 ΔE 0.037
- Medium Purple #9370DB ΔE 0.048
- Cornflower #6A79F7 ΔE 0.055
- Lighter Purple #A55AF4 ΔE 0.055
- Periwinkle #8E82FE ΔE 0.068
- Light Indigo #6D5ACF ΔE 0.070
- Dark Periwinkle #665FD1 ΔE 0.071
Use #8666F0 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.