#6643C1
Closest named color: Bluey Purple (#6241C7). oklch(49.4% 0.187 290.7), rgb(102, 67, 193).
Aa
White text reads best on this color (6.69:1).
About this color
#6643C1 is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.187 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 0.013 away. White text reads best on it, at 6.69:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.187) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #6643C1 |
| RGB | rgb(102, 67, 193) |
| HSL | hsl(257, 50%, 51%) |
| OKLCH | oklch(49.4% 0.187 290.7) |
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 #6643C1 | 6.69:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #6643C1 | 3.13:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #6643C1 text on white | 6.69:1 | AA | Lc 82.5 | Fine for body text |
| #6643C1 text on black | 3.13:1 | AA large text | Lc -19.4 | 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 700.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4F9
oklch(88.5% 0.051 290.3)
-
Step 300
300
#C0B7F7
oklch(80.9% 0.09 290.7)
-
Step 400
400
#A18FF3
oklch(70.7% 0.144 290.5)
-
Step 500
500
#8C6FEF
oklch(63.1% 0.185 290.5)
-
Step 600
600
#7853DD
oklch(55.6% 0.2 290.8)
-
Step 700
700 (this color)
#6643C1
oklch(49.4% 0.187 290.7)
-
Step 800
800
#52379B
oklch(42.6% 0.155 290.7)
-
Step 900
900
#43317B
oklch(37.5% 0.12 290.6)
-
Step 950
950
#271E48
oklch(27% 0.075 290.3)
#6643C1 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) | #005EC5 | 0.106 |
| Deuteranopia (no green cones) | #0059BE | 0.105 |
| Tritanopia (no blue cones) | #49617C | 0.150 |
| Achromatopsia (no color) | #5C5C5C | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6643C1
#6643C1
oklch(49.4% 0.187 290.7)
- #656600
#656600
oklch(49.3% 0.108 110.4)
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 #6643C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.013
- Blue With A Hint Of Purple #533CC6 ΔE 0.038
- Blurple #5539CC ΔE 0.041
- Iris #6258C4 ΔE 0.046
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.057
- Burple #6832E3 ΔE 0.058
- Purple Blue #5D21D0 ΔE 0.062
Use #6643C1 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.