#6B6BCF
Closest named color: Dark Periwinkle (#665FD1). oklch(57.7% 0.15 280.6), rgb(107, 107, 207).
Aa
Black text reads best on this color (4.62:1).
About this color
#6B6BCF is a medium-dark, vivid purple. In OKLCH its lightness is 58%, its chroma 0.150 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.032 away. Black text reads best on it, at 4.62:1.
| Hue family | Purples |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #6B6BCF |
| RGB | rgb(107, 107, 207) |
| HSL | hsl(240, 51%, 62%) |
| OKLCH | oklch(57.7% 0.15 280.6) |
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 #6B6BCF | 4.53:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #6B6BCF | 4.62:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #6B6BCF text on white | 4.53:1 | AA | Lc 71.3 | Content text, not long reading |
| #6B6BCF text on black | 4.62:1 | AA | Lc -30.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BCEC
oklch(80.8% 0.068 281)
-
Step 400
400
#9499E3
oklch(70.8% 0.108 280.3)
-
Step 500
500
#7B7DDB
oklch(63% 0.139 280.7)
-
Step 600
600 (this color)
#6B6BCF
oklch(57.7% 0.15 280.6)
-
Step 700
700
#5453AD
oklch(49.1% 0.14 280.4)
-
Step 800
800
#45448C
oklch(42.6% 0.116 280.9)
-
Step 900
900
#3A3A70
oklch(37.7% 0.091 281.1)
-
Step 950
950
#222242
oklch(27% 0.059 281.7)
#6B6BCF 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) | #3F7AD3 | 0.058 |
| Deuteranopia (no green cones) | #3772CD | 0.060 |
| Tritanopia (no blue cones) | #468093 | 0.130 |
| Achromatopsia (no color) | #767676 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B6BCF
#6B6BCF
oklch(57.7% 0.15 280.6)
- #8A7A00
#8A7A00
oklch(57.6% 0.12 100.1)
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 #6B6BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.032
- Light Indigo #6D5ACF ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.041
- Iris #6258C4 ΔE 0.052
- Medium Slate Blue #7B68EE ΔE 0.054
- Royal Blue #4169E1 ΔE 0.059
- Cornflower #6A79F7 ΔE 0.066
- Medium Purple #9370DB ΔE 0.067
Use #6B6BCF 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.