#866FF9
Closest named color: Medium Slate Blue (#7B68EE). oklch(63.3% 0.198 287), rgb(134, 111, 249).
Aa
Black text reads best on this color (5.65:1).
About this color
#866FF9 is a medium-light, vivid purple. In OKLCH its lightness is 63%, its chroma 0.198 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.029 away. Black text reads best on it, at 5.65:1.
| Hue family | Purples |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 5.65:1 |
| White text | 3.71:1 |
Values
| HEX | #866FF9 |
| RGB | rgb(134, 111, 249) |
| HSL | hsl(250, 92%, 71%) |
| OKLCH | oklch(63.3% 0.198 287) |
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 #866FF9 | 3.71:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #866FF9 | 5.65:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #866FF9 text on white | 3.71:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #866FF9 text on black | 5.65:1 | AA | Lc -37.3 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D6D4FC
oklch(88.4% 0.055 287.5)
-
Step 300
300
#BCB7FC
oklch(80.8% 0.097 287.3)
-
Step 400
400
#9B8FFB
oklch(70.7% 0.155 286.8)
-
Step 500
500 (this color)
#866FF9
oklch(63.3% 0.198 287)
-
Step 600
600
#7151E7
oklch(55.5% 0.215 287)
-
Step 700
700
#6041C9
oklch(49.2% 0.199 287.1)
-
Step 800
800
#4E36A3
oklch(42.7% 0.167 287.2)
-
Step 900
900
#403181
oklch(37.7% 0.129 287.1)
-
Step 950
950
#251E4C
oklch(27.1% 0.082 286.6)
#866FF9 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) | #1988FE | 0.109 |
| Deuteranopia (no green cones) | #1781F6 | 0.108 |
| Tritanopia (no blue cones) | #608EA9 | 0.166 |
| Achromatopsia (no color) | #858585 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #866FF9
#866FF9
oklch(63.3% 0.198 287)
- #948F00
#948F00
oklch(63.4% 0.136 107.2)
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 #866FF9, closest first.
No curated palette has a color within ΔE 0.04 of #866FF9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.029
- Cornflower #6A79F7 ΔE 0.043
- Periwinkle #8E82FE ΔE 0.047
- Medium Purple #9370DB ΔE 0.050
- Purpley #8756E4 ΔE 0.060
- Lavender Blue #8B88F8 ΔE 0.061
- Lighter Purple #A55AF4 ΔE 0.063
- Light Urple #B36FF6 ΔE 0.074
Use #866FF9 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.