#643673
Closest named color: Rebecca Purple (#663399). oklch(41.7% 0.11 317.3), rgb(100, 54, 115).
Aa
White text reads best on this color (9.06:1).
About this color
#643673 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.110 and its hue 317°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.064 away. White text reads best on it, at 9.06:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #643673 |
| RGB | rgb(100, 54, 115) |
| HSL | hsl(285, 36%, 33%) |
| OKLCH | oklch(41.7% 0.11 317.3) |
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 #643673 | 9.06:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #643673 | 2.31:1 | Fails | Lc 13.4 | Not readable |
| #643673 text on white | 9.06:1 | AAA | Lc 90.5 | Preferred for body text |
| #643673 text on black | 2.31:1 | Fails | Lc -11.8 | Not readable |
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 800.
-
Step 50
50
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#EFE6F2
oklch(93.5% 0.019 317.7)
-
Step 200
200
#E3D2E9
oklch(88.4% 0.036 317.3)
-
Step 300
300
#D2B4DC
oklch(80.9% 0.064 317.6)
-
Step 400
400
#BB8CCB
oklch(70.7% 0.103 317.3)
-
Step 500
500
#AA6EBD
oklch(63.1% 0.132 317.7)
-
Step 600
600
#9555A9
oklch(55.7% 0.142 317.7)
-
Step 700
700
#7F4491
oklch(49.1% 0.134 317.8)
-
Step 800
800 (this color)
#643673
oklch(41.7% 0.11 317.3)
-
Step 900
900
#54315F
oklch(37.6% 0.087 317.7)
-
Step 950
950
#311D38
oklch(26.9% 0.055 317)
#643673 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) | #2A4675 | 0.099 |
| Deuteranopia (no green cones) | #384A71 | 0.088 |
| Tritanopia (no blue cones) | #643F4F | 0.072 |
| Achromatopsia (no color) | #494949 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643673
#643673
oklch(41.7% 0.11 317.3)
- #2B5915
#2B5915
oklch(41.6% 0.11 137.4)
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 #643673, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.065
- Blueberry #464196 ΔE 0.079
- Twilight #4E518B ΔE 0.080
- Dusk #4E5481 ΔE 0.084
- Grape Purple #5D1451 ΔE 0.086
- Light Eggplant #894585 ΔE 0.087
- Brownish Purple #76424E ΔE 0.087
Use #643673 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.