#6667BB
Closest named color: Dark Periwinkle (#665FD1). oklch(55.3% 0.128 280.8), rgb(102, 103, 187).
Aa
White text reads best on this color (4.97:1).
About this color
#6667BB is a medium-dark, moderately saturated purple. In OKLCH its lightness is 55%, its chroma 0.128 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.042 away. White text reads best on it, at 4.97:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #6667BB |
| RGB | rgb(102, 103, 187) |
| HSL | hsl(239, 38%, 57%) |
| OKLCH | oklch(55.3% 0.128 280.8) |
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 #6667BB | 4.97:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #6667BB | 4.22:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #6667BB text on white | 4.97:1 | AA | Lc 74.3 | Content text, not long reading |
| #6667BB text on black | 4.22:1 | AA large text | Lc -27.4 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D5D7EF
oklch(88.5% 0.033 281.9)
-
Step 300
300
#B9BDE6
oklch(80.9% 0.058 280.6)
-
Step 400
400
#969AD9
oklch(70.7% 0.092 281)
-
Step 500
500
#7D80CF
oklch(63.1% 0.118 280.8)
-
Step 600
600 (this color)
#6667BB
oklch(55.3% 0.128 280.8)
-
Step 700
700
#5656A2
oklch(49.1% 0.119 281.1)
-
Step 800
800
#464783
oklch(42.7% 0.098 280.7)
-
Step 900
900
#3B3C69
oklch(37.8% 0.076 281.1)
-
Step 950
950
#22233E
oklch(26.9% 0.05 280.9)
#6667BB 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) | #4673BE | 0.047 |
| Deuteranopia (no green cones) | #416DB9 | 0.047 |
| Tritanopia (no blue cones) | #4A7888 | 0.110 |
| Achromatopsia (no color) | #707070 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6667BB
#6667BB
oklch(55.3% 0.128 280.8)
- #817300
#817300
oklch(55.1% 0.115 100.9)
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 #6667BB, closest first.
No curated palette has a color within ΔE 0.04 of #6667BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.042
- Iris #6258C4 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.048
- French Blue #436BAD ΔE 0.051
- Windows Blue #3778BF ΔE 0.063
- Deep Lavender #8D5EB7 ΔE 0.064
- Flat Blue #3C73A8 ΔE 0.068
Use #6667BB 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.