#643574
Closest named color: Rebecca Purple (#663399). oklch(41.6% 0.113 316.9), rgb(100, 53, 116).
Aa
White text reads best on this color (9.11:1).
About this color
#643574 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.113 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 0.062 away. White text reads best on it, at 9.11:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #643574 |
| RGB | rgb(100, 53, 116) |
| HSL | hsl(285, 37%, 33%) |
| OKLCH | oklch(41.6% 0.113 316.9) |
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 #643574 | 9.11:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #643574 | 2.30:1 | Fails | Lc 13.3 | Not readable |
| #643574 text on white | 9.11:1 | AAA | Lc 90.7 | Preferred for body text |
| #643574 text on black | 2.30:1 | Fails | Lc -11.6 | 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
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E3D2EA
oklch(88.5% 0.037 316.2)
-
Step 300
300
#D2B4DD
oklch(80.9% 0.065 316.9)
-
Step 400
400
#BB8CCC
oklch(70.7% 0.104 316.9)
-
Step 500
500
#AA6DBF
oklch(63.1% 0.136 317.1)
-
Step 600
600
#9554AB
oklch(55.6% 0.146 317)
-
Step 700
700
#7F4493
oklch(49.2% 0.136 316.9)
-
Step 800
800 (this color)
#643574
oklch(41.6% 0.113 316.9)
-
Step 900
900
#543160
oklch(37.7% 0.088 317)
-
Step 950
950
#311D38
oklch(26.9% 0.055 317)
#643574 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) | #284576 | 0.101 |
| Deuteranopia (no green cones) | #374A72 | 0.090 |
| Tritanopia (no blue cones) | #633E4F | 0.073 |
| Achromatopsia (no color) | #484848 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643574
#643574
oklch(41.6% 0.113 316.9)
- #2B5911
#2B5911
oklch(41.6% 0.113 136.8)
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 #643574, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.079
- Twilight #4E518B ΔE 0.081
- Grape Purple #5D1451 ΔE 0.085
- Purple #800080 ΔE 0.086
- Dusk #4E5481 ΔE 0.086
- Rich Purple #720058 ΔE 0.086
Use #643574 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.