#6C66ED
Closest named color: Medium Slate Blue (#7B68EE). oklch(58.9% 0.197 280.4), rgb(108, 102, 237).
Aa
Black text reads best on this color (4.76:1).
About this color
#6C66ED is a medium-dark, vivid purple. In OKLCH its lightness is 59%, its chroma 0.197 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.024 away. Black text reads best on it, at 4.76:1.
| Hue family | Purples |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.197) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.76:1 |
| White text | 4.41:1 |
Values
| HEX | #6C66ED |
| RGB | rgb(108, 102, 237) |
| HSL | hsl(243, 79%, 66%) |
| OKLCH | oklch(58.9% 0.197 280.4) |
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 #6C66ED | 4.41:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #6C66ED | 4.76:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #6C66ED text on white | 4.41:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #6C66ED text on black | 4.76:1 | AA | Lc -31.5 | 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 600.
-
Step 50
50
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6FA
oklch(88.4% 0.05 280.3)
-
Step 300
300
#B5BBF9
oklch(80.9% 0.088 279.9)
-
Step 400
400
#9195F7
oklch(70.8% 0.142 280.3)
-
Step 500
500
#7877F3
oklch(63.2% 0.181 280.2)
-
Step 600
600 (this color)
#6C66ED
oklch(58.9% 0.197 280.4)
-
Step 700
700
#534AC4
oklch(49.1% 0.183 280.5)
-
Step 800
800
#433E9E
oklch(42.7% 0.151 280.2)
-
Step 900
900
#38367E
oklch(37.7% 0.118 280.3)
-
Step 950
950
#21204A
oklch(27% 0.076 281.1)
#6C66ED 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) | #007DF2 | 0.087 |
| Deuteranopia (no green cones) | #0073EA | 0.084 |
| Tritanopia (no blue cones) | #2D86A0 | 0.170 |
| Achromatopsia (no color) | #787878 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C66ED
#6C66ED
oklch(58.9% 0.197 280.4)
- #8E7E00
#8E7E00
oklch(59% 0.123 100.4)
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 #6C66ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.024
- Cornflower #6A79F7 ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.052
- Purpley #8756E4 ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.055
- Neon Blue #4361EE ΔE 0.055
- Royal Blue #4169E1 ΔE 0.056
Use #6C66ED 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.