#643EB3
Closest named color: Bluey Purple (#6241C7). oklch(47.4% 0.176 293.5), rgb(100, 62, 179).
Aa
White text reads best on this color (7.28:1).
About this color
#643EB3 is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.176 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 0.032 away. White text reads best on it, at 7.28:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.88:1 |
| White text | 7.28:1 |
Values
| HEX | #643EB3 |
| RGB | rgb(100, 62, 179) |
| HSL | hsl(259, 49%, 47%) |
| OKLCH | oklch(47.4% 0.176 293.5) |
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 #643EB3 | 7.28:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #643EB3 | 2.88:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #643EB3 text on white | 7.28:1 | AAA | Lc 84.8 | Fine for body text |
| #643EB3 text on black | 2.88:1 | Fails | Lc -17.2 | 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
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F6
oklch(88.5% 0.047 293.5)
-
Step 300
300
#C3B7F3
oklch(81% 0.085 293.6)
-
Step 400
400
#A58FED
oklch(70.8% 0.136 293.4)
-
Step 500
500
#9070E7
oklch(63.1% 0.173 293.2)
-
Step 600
600
#7C54D5
oklch(55.6% 0.189 293.6)
-
Step 700
700 (this color)
#643EB3
oklch(47.4% 0.176 293.5)
-
Step 800
800
#553896
oklch(42.6% 0.147 293.4)
-
Step 900
900
#463277
oklch(37.7% 0.113 293.6)
-
Step 950
950
#291E46
oklch(27.1% 0.072 293.7)
#643EB3 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) | #0058B7 | 0.108 |
| Deuteranopia (no green cones) | #0054B1 | 0.108 |
| Tritanopia (no blue cones) | #4E5A73 | 0.140 |
| Achromatopsia (no color) | #565656 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643EB3
#643EB3
oklch(47.4% 0.176 293.5)
- #5C6200
#5C6200
oklch(47.5% 0.107 113.9)
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 #643EB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.032
- Blue With A Hint Of Purple #533CC6 ΔE 0.044
- Rebecca Purple #663399 ΔE 0.047
- Blurple #5539CC ΔE 0.050
- Iris #6258C4 ΔE 0.063
- Purple Blue #5D21D0 ΔE 0.065
- Blueberry #464196 ΔE 0.069
- Grape #7209B7 ΔE 0.069
Use #643EB3 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.