#643170
Closest named color: Rebecca Purple (#663399). oklch(40.7% 0.116 319.7), rgb(100, 49, 112).
Aa
White text reads best on this color (9.48:1).
About this color
#643170 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.116 and its hue 320°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.068 away. White text reads best on it, at 9.48:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #643170 |
| RGB | rgb(100, 49, 112) |
| HSL | hsl(289, 39%, 32%) |
| OKLCH | oklch(40.7% 0.116 319.7) |
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 #643170 | 9.48:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #643170 | 2.21:1 | Fails | Lc 12.4 | Not readable |
| #643170 text on white | 9.48:1 | AAA | Lc 91.6 | Preferred for body text |
| #643170 text on black | 2.21:1 | Fails | Lc -10.8 | 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
#F0E6F2
oklch(93.6% 0.019 320.6)
-
Step 200
200
#E4D2E9
oklch(88.5% 0.037 318.9)
-
Step 300
300
#D4B3DC
oklch(80.8% 0.067 319.6)
-
Step 400
400
#BE8ACB
oklch(70.6% 0.109 319.5)
-
Step 500
500
#AD6BBD
oklch(63% 0.138 319.6)
-
Step 600
600
#9951A9
oklch(55.6% 0.151 320.1)
-
Step 700
700
#824291
oklch(49.1% 0.139 319.7)
-
Step 800
800 (this color)
#643170
oklch(40.7% 0.116 319.7)
-
Step 900
900
#56305F
oklch(37.7% 0.09 319.7)
-
Step 950
950
#321C38
oklch(26.9% 0.058 318.8)
#643170 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) | #254272 | 0.108 |
| Deuteranopia (no green cones) | #36486E | 0.095 |
| Tritanopia (no blue cones) | #643A4B | 0.073 |
| Achromatopsia (no color) | #464646 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643170
#643170
oklch(40.7% 0.116 319.7)
- #215812
#215812
oklch(40.8% 0.116 139.9)
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 #643170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.071
- Grape Purple #5D1451 ΔE 0.075
- Rich Purple #720058 ΔE 0.077
- Velvet #750851 ΔE 0.079
- Purple #800080 ΔE 0.082
- Blueberry #464196 ΔE 0.086
- Twilight #4E518B ΔE 0.091
Use #643170 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.