#6A66DB
Closest named color: Dark Periwinkle (#665FD1). oklch(57.5% 0.174 281), rgb(106, 102, 219).
Aa
White text reads best on this color (4.62:1).
About this color
#6A66DB is a medium-dark, vivid purple. In OKLCH its lightness is 57%, its chroma 0.174 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.023 away. White text reads best on it, at 4.62:1.
| Hue family | Purples |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #6A66DB |
| RGB | rgb(106, 102, 219) |
| HSL | hsl(242, 62%, 63%) |
| OKLCH | oklch(57.5% 0.174 281) |
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 #6A66DB | 4.62:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #6A66DB | 4.53:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #6A66DB text on white | 4.62:1 | AA | Lc 71.9 | Content text, not long reading |
| #6A66DB text on black | 4.53:1 | AA | Lc -29.8 | Dividers and decoration only |
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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D3D6F6
oklch(88.4% 0.044 281.2)
-
Step 300
300
#B7BBF3
oklch(80.8% 0.079 281.3)
-
Step 400
400
#9396ED
oklch(70.6% 0.126 281.1)
-
Step 500
500
#7A7AE7
oklch(63.1% 0.16 280.8)
-
Step 600
600 (this color)
#6A66DB
oklch(57.5% 0.174 281)
-
Step 700
700
#544FB8
oklch(49.1% 0.161 280.8)
-
Step 800
800
#454195
oklch(42.7% 0.134 281.2)
-
Step 900
900
#393877
oklch(37.7% 0.105 280.8)
-
Step 950
950
#212146
oklch(26.9% 0.067 280.9)
#6A66DB 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) | #2379DF | 0.076 |
| Deuteranopia (no green cones) | #1170D9 | 0.080 |
| Tritanopia (no blue cones) | #3B8097 | 0.149 |
| Achromatopsia (no color) | #757575 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6A66DB
#6A66DB
oklch(57.5% 0.174 281)
- #887A00
#887A00
oklch(57.4% 0.12 101.4)
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 #6A66DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.023
- Light Indigo #6D5ACF ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.034
- Medium Slate Blue #7B68EE ΔE 0.039
- Iris #6258C4 ΔE 0.049
- Royal Blue #4169E1 ΔE 0.050
- Purpley #8756E4 ΔE 0.057
- Cornflower #6A79F7 ΔE 0.059
Use #6A66DB 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.