#6647A8
Closest named color: Rebecca Purple (#663399). oklch(48.2% 0.15 294.9), rgb(102, 71, 168).
Aa
White text reads best on this color (6.92:1).
About this color
#6647A8 is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.150 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.048 away. White text reads best on it, at 6.92:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #6647A8 |
| RGB | rgb(102, 71, 168) |
| HSL | hsl(259, 41%, 47%) |
| OKLCH | oklch(48.2% 0.15 294.9) |
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 #6647A8 | 6.92:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #6647A8 | 3.03:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #6647A8 text on white | 6.92:1 | AA | Lc 83.6 | Fine for body text |
| #6647A8 text on black | 3.03:1 | AA large text | Lc -18.3 | 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 700.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD4F2
oklch(88.4% 0.041 294.7)
-
Step 300
300
#C3B8EB
oklch(80.9% 0.072 294.6)
-
Step 400
400
#A692E1
oklch(70.8% 0.115 294.9)
-
Step 500
500
#9174D9
oklch(63.1% 0.149 295)
-
Step 600
600
#7C5BC6
oklch(55.7% 0.16 294.9)
-
Step 700
700 (this color)
#6647A8
oklch(48.2% 0.15 294.9)
-
Step 800
800
#553D8B
oklch(42.7% 0.125 294.7)
-
Step 900
900
#46356F
oklch(37.7% 0.097 294.8)
-
Step 950
950
#291F41
oklch(26.9% 0.062 295.5)
#6647A8 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) | #135BAB | 0.100 |
| Deuteranopia (no green cones) | #1F58A6 | 0.094 |
| Tritanopia (no blue cones) | #565C70 | 0.120 |
| Achromatopsia (no color) | #5A5A5A | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6647A8
#6647A8
oklch(48.2% 0.15 294.9)
- #5D6400
#5D6400
oklch(48.1% 0.108 114.5)
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 #6647A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.048
- Bluey Purple #6241C7 ΔE 0.052
- Iris #6258C4 ΔE 0.057
- Blueberry #464196 ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Twilight #4E518B ΔE 0.068
- Slate Blue #6A5ACD ΔE 0.071
- Blurple #5539CC ΔE 0.073
Use #6647A8 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.