#6647B8
Closest named color: Bluey Purple (#6241C7). oklch(49.3% 0.17 291.5), rgb(102, 71, 184).
Aa
White text reads best on this color (6.64:1).
About this color
#6647B8 is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.170 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.028 away. White text reads best on it, at 6.64:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.15:1 |
| White text | 6.64:1 |
Values
| HEX | #6647B8 |
| RGB | rgb(102, 71, 184) |
| HSL | hsl(256, 44%, 50%) |
| OKLCH | oklch(49.3% 0.17 291.5) |
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 #6647B8 | 6.64:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #6647B8 | 3.15:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #6647B8 text on white | 6.64:1 | AA | Lc 82.4 | Fine for body text |
| #6647B8 text on black | 3.15:1 | AA large text | Lc -19.5 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#D9D4F6
oklch(88.5% 0.047 292.2)
-
Step 300
300
#C1B8F2
oklch(81% 0.081 291.6)
-
Step 400
400
#A290EC
oklch(70.6% 0.133 291.6)
-
Step 500
500
#8D72E6
oklch(63.1% 0.169 291.5)
-
Step 600
600
#7857D4
oklch(55.6% 0.184 291.4)
-
Step 700
700 (this color)
#6647B8
oklch(49.3% 0.17 291.5)
-
Step 800
800
#523B94
oklch(42.7% 0.14 291.2)
-
Step 900
900
#443376
oklch(37.6% 0.11 291.9)
-
Step 950
950
#271F45
oklch(27% 0.069 290.8)
#6647B8 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) | #005EBC | 0.104 |
| Deuteranopia (no green cones) | #005AB6 | 0.103 |
| Tritanopia (no blue cones) | #4E6179 | 0.137 |
| Achromatopsia (no color) | #5C5C5C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6647B8
#6647B8
oklch(49.3% 0.17 291.5)
- #646700
#646700
oklch(49.5% 0.109 111.8)
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 #6647B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.028
- Iris #6258C4 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.053
- Blurple #5539CC ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.056
- Rebecca Purple #663399 ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.065
Use #6647B8 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.