#6F66BB
Closest named color: Dark Periwinkle (#665FD1). oklch(55.8% 0.129 286.3), rgb(111, 102, 187).
Aa
White text reads best on this color (4.89:1).
About this color
#6F66BB is a medium-dark, moderately saturated purple. In OKLCH its lightness is 56%, its chroma 0.129 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.043 away. White text reads best on it, at 4.89:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #6F66BB |
| RGB | rgb(111, 102, 187) |
| HSL | hsl(246, 38%, 57%) |
| OKLCH | oklch(55.8% 0.129 286.3) |
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 #6F66BB | 4.89:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #6F66BB | 4.29:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #6F66BB text on white | 4.89:1 | AA | Lc 73.8 | Content text, not long reading |
| #6F66BB text on black | 4.29:1 | AA large text | Lc -27.9 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F5
oklch(93.5% 0.017 286.1)
-
Step 200
200
#D7D6EE
oklch(88.4% 0.033 287.6)
-
Step 300
300
#BDBCE5
oklch(81% 0.057 286.2)
-
Step 400
400
#9C98D8
oklch(70.7% 0.093 286.6)
-
Step 500
500
#847ECD
oklch(63.2% 0.117 286)
-
Step 600
600 (this color)
#6F66BB
oklch(55.8% 0.129 286.3)
-
Step 700
700
#5D54A1
oklch(49.2% 0.12 286.5)
-
Step 800
800
#4B4582
oklch(42.7% 0.099 285.9)
-
Step 900
900
#3F3A68
oklch(37.6% 0.077 287)
-
Step 950
950
#25223D
oklch(26.9% 0.05 287.7)
#6F66BB 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) | #4773BE | 0.057 |
| Deuteranopia (no green cones) | #456EB9 | 0.056 |
| Tritanopia (no blue cones) | #597787 | 0.110 |
| Achromatopsia (no color) | #717171 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6F66BB
#6F66BB
oklch(55.8% 0.129 286.3)
- #7D7700
#7D7700
oklch(55.7% 0.119 106.2)
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 #6F66BB, closest first.
No curated palette has a color within ΔE 0.04 of #6F66BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.046
- Iris #6258C4 ΔE 0.046
- Deep Lavender #8D5EB7 ΔE 0.051
- French Blue #436BAD ΔE 0.064
- Dark Lavender #856798 ΔE 0.066
- Deep Lilac #966EBD ΔE 0.068
Use #6F66BB 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.