#6643CE
Closest named color: Bluey Purple (#6241C7). oklch(50.5% 0.202 288.5), rgb(102, 67, 206).
Aa
White text reads best on this color (6.44:1).
About this color
#6643CE is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.202 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.014 away. White text reads best on it, at 6.44:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #6643CE |
| RGB | rgb(102, 67, 206) |
| HSL | hsl(255, 59%, 54%) |
| OKLCH | oklch(50.5% 0.202 288.5) |
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 #6643CE | 6.44:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #6643CE | 3.25:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #6643CE text on white | 6.44:1 | AA | Lc 81.4 | Fine for body text |
| #6643CE text on black | 3.25:1 | AA large text | Lc -20.5 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D7D4FC
oklch(88.5% 0.055 288.7)
-
Step 300
300
#BEB7FD
oklch(81% 0.098 288.6)
-
Step 400
400
#9E8EFB
oklch(70.7% 0.156 288.5)
-
Step 500
500
#896DF9
oklch(63.2% 0.2 288.5)
-
Step 600
600
#754FE8
oklch(55.6% 0.218 288.6)
-
Step 700
700 (this color)
#6643CE
oklch(50.5% 0.202 288.5)
-
Step 800
800
#5035A3
oklch(42.7% 0.168 288.5)
-
Step 900
900
#423081
oklch(37.7% 0.13 288.8)
-
Step 950
950
#261D4C
oklch(27% 0.083 288.3)
#6643CE 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) | #0061D2 | 0.105 |
| Deuteranopia (no green cones) | #005BCB | 0.102 |
| Tritanopia (no blue cones) | #416683 | 0.165 |
| Achromatopsia (no color) | #5E5E5E | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6643CE
#6643CE
oklch(50.5% 0.202 288.5)
- #6A6900
#6A6900
oklch(50.5% 0.11 109.1)
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 #6643CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.014
- Blurple #5539CC ΔE 0.037
- Blue With A Hint Of Purple #533CC6 ΔE 0.039
- Burple #6832E3 ΔE 0.041
- Purpley Blue #5F34E7 ΔE 0.048
- Iris #6258C4 ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.052
Use #6643CE 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.