#6648BB
Closest named color: Bluey Purple (#6241C7). oklch(49.7% 0.173 290.8), rgb(102, 72, 187).
Aa
White text reads best on this color (6.54:1).
About this color
#6648BB is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.173 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.026 away. White text reads best on it, at 6.54:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.20:1 |
| White text | 6.54:1 |
Values
| HEX | #6648BB |
| RGB | rgb(102, 72, 187) |
| HSL | hsl(256, 46%, 51%) |
| OKLCH | oklch(49.7% 0.173 290.8) |
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 #6648BB | 6.54:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #6648BB | 3.20:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #6648BB text on white | 6.54:1 | AA | Lc 82.0 | Fine for body text |
| #6648BB text on black | 3.20:1 | AA large text | Lc -19.9 | 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
#E9E7F9
oklch(93.5% 0.024 291)
-
Step 200
200
#D8D4F6
oklch(88.4% 0.047 290.8)
-
Step 300
300
#C0B8F3
oklch(81% 0.083 290.6)
-
Step 400
400
#A190ED
oklch(70.6% 0.134 291)
-
Step 500
500
#8C72E7
oklch(63.1% 0.17 290.9)
-
Step 600
600
#7757D5
oklch(55.6% 0.185 290.8)
-
Step 700
700 (this color)
#6648BB
oklch(49.7% 0.173 290.8)
-
Step 800
800
#523B96
oklch(42.8% 0.143 290.8)
-
Step 900
900
#433377
oklch(37.6% 0.112 290.9)
-
Step 950
950
#271F46
oklch(27.1% 0.07 290.3)
#6648BB 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) | #005FBF | 0.102 |
| Deuteranopia (no green cones) | #005BB9 | 0.102 |
| Tritanopia (no blue cones) | #4C627B | 0.139 |
| Achromatopsia (no color) | #5D5D5D | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6648BB
#6648BB
oklch(49.7% 0.173 290.8)
- #666700
#666700
oklch(49.6% 0.109 110.4)
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 #6648BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.026
- Iris #6258C4 ΔE 0.038
- Blue With A Hint Of Purple #533CC6 ΔE 0.047
- Slate Blue #6A5ACD ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.052
- Blurple #5539CC ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.061
- Rebecca Purple #663399 ΔE 0.069
Use #6648BB 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.