#866DFB
Closest named color: Medium Slate Blue (#7B68EE). oklch(63.1% 0.203 287.2), rgb(134, 109, 251).
Aa
Black text reads best on this color (5.59:1).
About this color
#866DFB is a medium-light, vivid purple. In OKLCH its lightness is 63%, its chroma 0.203 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.028 away. Black text reads best on it, at 5.59:1.
| Hue family | Purples |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 5.59:1 |
| White text | 3.75:1 |
Values
| HEX | #866DFB |
| RGB | rgb(134, 109, 251) |
| HSL | hsl(251, 95%, 71%) |
| OKLCH | oklch(63.1% 0.203 287.2) |
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 #866DFB | 3.75:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #866DFB | 5.59:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #866DFB text on white | 3.75:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #866DFB text on black | 5.59:1 | AA | Lc -36.9 | 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
#E8E7FD
oklch(93.5% 0.03 287.9)
-
Step 200
200
#D6D4FD
oklch(88.5% 0.056 287.4)
-
Step 300
300
#BCB7FE
oklch(80.9% 0.1 287.2)
-
Step 400
400
#9C8EFD
oklch(70.7% 0.159 287.4)
-
Step 500
500 (this color)
#866DFB
oklch(63.1% 0.203 287.2)
-
Step 600
600
#724FEA
oklch(55.5% 0.221 287.2)
-
Step 700
700
#603FCC
oklch(49.2% 0.205 287)
-
Step 800
800
#4E35A5
oklch(42.7% 0.17 287.1)
-
Step 900
900
#403083
oklch(37.7% 0.133 287)
-
Step 950
950
#251D4C
oklch(26.9% 0.083 287.2)
#866DFB 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) | #0087FF | 0.115 |
| Deuteranopia (no green cones) | #0080F8 | 0.114 |
| Tritanopia (no blue cones) | #5F8DAA | 0.169 |
| Achromatopsia (no color) | #848484 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #866DFB
#866DFB
oklch(63.1% 0.203 287.2)
- #938E00
#938E00
oklch(63.1% 0.135 107.2)
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 #866DFB, closest first.
No curated palette has a color within ΔE 0.04 of #866DFB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.028
- Cornflower #6A79F7 ΔE 0.046
- Periwinkle #8E82FE ΔE 0.051
- Medium Purple #9370DB ΔE 0.054
- Purpley #8756E4 ΔE 0.058
- Lighter Purple #A55AF4 ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.066
- Light Urple #B36FF6 ΔE 0.075
Use #866DFB 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.