#6E66CF
Closest named color: Dark Periwinkle (#665FD1). oklch(57% 0.157 283.7), rgb(110, 102, 207).
Aa
White text reads best on this color (4.70:1).
About this color
#6E66CF is a medium-dark, vivid purple. In OKLCH its lightness is 57%, its chroma 0.157 and its hue 284°. 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 4.70:1.
| Hue family | Purples |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #6E66CF |
| RGB | rgb(110, 102, 207) |
| HSL | hsl(245, 52%, 61%) |
| OKLCH | oklch(57% 0.157 283.7) |
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 #6E66CF | 4.70:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #6E66CF | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #6E66CF text on white | 4.70:1 | AA | Lc 72.4 | Content text, not long reading |
| #6E66CF text on black | 4.46:1 | AA large text | Lc -29.2 | 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
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F3
oklch(88.4% 0.04 284)
-
Step 300
300
#BABBED
oklch(80.8% 0.07 283.8)
-
Step 400
400
#9897E5
oklch(70.8% 0.113 283.7)
-
Step 500
500
#807BDD
oklch(63.1% 0.144 283.8)
-
Step 600
600 (this color)
#6E66CF
oklch(57% 0.157 283.7)
-
Step 700
700
#5950AF
oklch(49% 0.146 283.9)
-
Step 800
800
#48428E
oklch(42.6% 0.122 283.5)
-
Step 900
900
#3C3971
oklch(37.7% 0.093 283.4)
-
Step 950
950
#232242
oklch(27.1% 0.058 283.2)
#6E66CF 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) | #3577D3 | 0.071 |
| Deuteranopia (no green cones) | #3070CD | 0.071 |
| Tritanopia (no blue cones) | #4D7D91 | 0.134 |
| Achromatopsia (no color) | #747474 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6E66CF
#6E66CF
oklch(57% 0.157 283.7)
- #847A00
#847A00
oklch(57% 0.12 103.8)
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 #6E66CF, 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 0.029
- Slate Blue #6A5ACD ΔE 0.030
- Iris #6258C4 ΔE 0.043
- Medium Slate Blue #7B68EE ΔE 0.051
- Purpley #8756E4 ΔE 0.061
- Royal Blue #4169E1 ΔE 0.061
- Deep Lavender #8D5EB7 ΔE 0.062
Use #6E66CF 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.