#6643B4
Closest named color: Bluey Purple (#6241C7). oklch(48.4% 0.171 293.2), rgb(102, 67, 180).
Aa
White text reads best on this color (6.93:1).
About this color
#6643B4 is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.171 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.031 away. White text reads best on it, at 6.93:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #6643B4 |
| RGB | rgb(102, 67, 180) |
| HSL | hsl(259, 46%, 48%) |
| OKLCH | oklch(48.4% 0.171 293.2) |
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 #6643B4 | 6.93:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #6643B4 | 3.02:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #6643B4 text on white | 6.93:1 | AA | Lc 83.6 | Fine for body text |
| #6643B4 text on black | 3.02:1 | AA large text | Lc -18.4 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F5
oklch(88.5% 0.045 293.8)
-
Step 300
300
#C2B7F2
oklch(80.9% 0.083 293)
-
Step 400
400
#A490EB
oklch(70.8% 0.131 292.8)
-
Step 500
500
#9071E5
oklch(63.2% 0.169 293.3)
-
Step 600
600
#7B56D2
oklch(55.6% 0.183 293.3)
-
Step 700
700 (this color)
#6643B4
oklch(48.4% 0.171 293.2)
-
Step 800
800
#553A94
oklch(42.8% 0.142 293.3)
-
Step 900
900
#453376
oklch(37.7% 0.11 292.7)
-
Step 950
950
#281E45
oklch(26.9% 0.071 292.9)
#6643B4 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) | #005BB8 | 0.107 |
| Deuteranopia (no green cones) | #0058B2 | 0.107 |
| Tritanopia (no blue cones) | #505D75 | 0.136 |
| Achromatopsia (no color) | #5A5A5A | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6643B4
#6643B4
oklch(48.4% 0.171 293.2)
- #5F6400
#5F6400
oklch(48.2% 0.108 113.1)
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 #6643B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.031
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Iris #6258C4 ΔE 0.052
- Rebecca Purple #663399 ΔE 0.054
- Blurple #5539CC ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.064
- Light Indigo #6D5ACF ΔE 0.067
- Blueberry #464196 ΔE 0.073
Use #6643B4 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.