#6647A3
Closest named color: Rebecca Purple (#663399). oklch(47.8% 0.143 296.1), rgb(102, 71, 163).
Aa
White text reads best on this color (7.01:1).
About this color
#6647A3 is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.143 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.046 away. White text reads best on it, at 7.01:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #6647A3 |
| RGB | rgb(102, 71, 163) |
| HSL | hsl(260, 39%, 46%) |
| OKLCH | oklch(47.8% 0.143 296.1) |
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 #6647A3 | 7.01:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #6647A3 | 2.99:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #6647A3 text on white | 7.01:1 | AAA | Lc 84.0 | Fine for body text |
| #6647A3 text on black | 2.99:1 | Fails | Lc -18.0 | 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
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F0
oklch(88.4% 0.039 297)
-
Step 300
300
#C4B8E9
oklch(80.9% 0.069 296)
-
Step 400
400
#A792DE
oklch(70.8% 0.111 296.2)
-
Step 500
500
#9275D4
oklch(63.1% 0.141 296.2)
-
Step 600
600
#7D5CC2
oklch(55.7% 0.154 295.9)
-
Step 700
700 (this color)
#6647A3
oklch(47.8% 0.143 296.1)
-
Step 800
800
#563E87
oklch(42.7% 0.118 296.2)
-
Step 900
900
#47356C
oklch(37.6% 0.092 296.8)
-
Step 950
950
#29203F
oklch(27% 0.057 295.7)
#6647A3 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) | #1C5AA6 | 0.097 |
| Deuteranopia (no green cones) | #2658A1 | 0.090 |
| Tritanopia (no blue cones) | #585A6E | 0.112 |
| Achromatopsia (no color) | #595959 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6647A3
#6647A3
oklch(47.8% 0.143 296.1)
- #5A6400
#5A6400
oklch(47.8% 0.11 116.4)
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 #6647A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Twilight #4E518B ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Slate Blue #6A5ACD ΔE 0.077
Use #6647A3 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.