#643DC0
Closest named color: Bluey Purple (#6241C7). oklch(48.3% 0.193 291.1), rgb(100, 61, 192).
Aa
White text reads best on this color (7.06:1).
About this color
#643DC0 is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.193 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 0.014 away. White text reads best on it, at 7.06:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.193) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.97:1 |
| White text | 7.06:1 |
Values
| HEX | #643DC0 |
| RGB | rgb(100, 61, 192) |
| HSL | hsl(258, 52%, 50%) |
| OKLCH | oklch(48.3% 0.193 291.1) |
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 #643DC0 | 7.06:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #643DC0 | 2.97:1 | Fails | Lc 20.2 | Dividers and decoration only |
| #643DC0 text on white | 7.06:1 | AAA | Lc 83.9 | Fine for body text |
| #643DC0 text on black | 2.97:1 | Fails | Lc -18.1 | 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
#D9D4FA
oklch(88.6% 0.052 291.3)
-
Step 300
300
#C0B6F9
oklch(80.8% 0.094 291)
-
Step 400
400
#A28EF6
oklch(70.8% 0.149 290.9)
-
Step 500
500
#8D6DF2
oklch(63.1% 0.191 291)
-
Step 600
600
#7950E0
oklch(55.5% 0.208 291.2)
-
Step 700
700 (this color)
#643DC0
oklch(48.3% 0.193 291.1)
-
Step 800
800
#53369E
oklch(42.8% 0.16 290.9)
-
Step 900
900
#44307D
oklch(37.6% 0.125 291.2)
-
Step 950
950
#281D49
oklch(27% 0.079 291.8)
#643DC0 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) | #005BC4 | 0.108 |
| Deuteranopia (no green cones) | #0056BD | 0.106 |
| Tritanopia (no blue cones) | #475E7A | 0.154 |
| Achromatopsia (no color) | #585858 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643DC0
#643DC0
oklch(48.3% 0.193 291.1)
- #616300
#616300
oklch(48.2% 0.106 111.2)
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 #643DC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.014
- Blue With A Hint Of Purple #533CC6 ΔE 0.032
- Blurple #5539CC ΔE 0.035
- Purple Blue #5D21D0 ΔE 0.051
- Burple #6832E3 ΔE 0.056
- Iris #6258C4 ΔE 0.059
- Purpley Blue #5F34E7 ΔE 0.063
- Rebecca Purple #663399 ΔE 0.065
Use #643DC0 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.