#6D66D2
Closest named color: Dark Periwinkle (#665FD1). oklch(57.1% 0.161 283), rgb(109, 102, 210).
Aa
White text reads best on this color (4.68:1).
About this color
#6D66D2 is a medium-dark, vivid purple. In OKLCH its lightness is 57%, its chroma 0.161 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.021 away. White text reads best on it, at 4.68:1.
| Hue family | Purples |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #6D66D2 |
| RGB | rgb(109, 102, 210) |
| HSL | hsl(244, 55%, 61%) |
| OKLCH | oklch(57.1% 0.161 283) |
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 #6D66D2 | 4.68:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #6D66D2 | 4.48:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #6D66D2 text on white | 4.68:1 | AA | Lc 72.3 | Content text, not long reading |
| #6D66D2 text on black | 4.48:1 | AA large text | Lc -29.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F8
oklch(93.5% 0.022 283.1)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#B9BBEF
oklch(80.8% 0.073 282.9)
-
Step 400
400
#9697E7
oklch(70.8% 0.116 282.5)
-
Step 500
500
#7E7BDF
oklch(63.1% 0.147 282.7)
-
Step 600
600 (this color)
#6D66D2
oklch(57.1% 0.161 283)
-
Step 700
700
#5850B1
oklch(49.1% 0.149 283.2)
-
Step 800
800
#484290
oklch(42.8% 0.125 283.3)
-
Step 900
900
#3B3973
oklch(37.8% 0.097 282.3)
-
Step 950
950
#232243
oklch(27.1% 0.06 283)
#6D66D2 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) | #3177D6 | 0.072 |
| Deuteranopia (no green cones) | #2A70D0 | 0.074 |
| Tritanopia (no blue cones) | #497D92 | 0.137 |
| Achromatopsia (no color) | #747474 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6D66D2
#6D66D2
oklch(57.1% 0.161 283)
- #857A00
#857A00
oklch(57.1% 0.12 103.2)
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 #6D66D2, closest first.
No curated palette has a color within ΔE 0.04 of #6D66D2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.021
- Light Indigo #6D5ACF ΔE 0.029
- Slate Blue #6A5ACD ΔE 0.030
- Iris #6258C4 ΔE 0.044
- Medium Slate Blue #7B68EE ΔE 0.048
- Royal Blue #4169E1 ΔE 0.058
- Purpley #8756E4 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.065
Use #6D66D2 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.