#643676
Closest named color: Rebecca Purple (#663399). oklch(41.9% 0.114 315.7), rgb(100, 54, 118).
Aa
White text reads best on this color (9.00:1).
About this color
#643676 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.114 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.059 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #643676 |
| RGB | rgb(100, 54, 118) |
| HSL | hsl(283, 37%, 34%) |
| OKLCH | oklch(41.9% 0.114 315.7) |
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 #643676 | 9.00:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #643676 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #643676 text on white | 9.00:1 | AAA | Lc 90.4 | Preferred for body text |
| #643676 text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
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
#D2B4DE
oklch(80.9% 0.067 316.3)
-
Step 400
400
#BA8CCE
oklch(70.7% 0.106 315.3)
-
Step 500
500
#A96EC1
oklch(63.2% 0.136 315.6)
-
Step 600
600
#9454AD
oklch(55.6% 0.148 315.7)
-
Step 700
700
#7E4495
oklch(49.2% 0.138 315.5)
-
Step 800
800 (this color)
#643676
oklch(41.9% 0.114 315.7)
-
Step 900
900
#533161
oklch(37.6% 0.089 315.4)
-
Step 950
950
#311D39
oklch(27% 0.057 315.8)
#643676 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) | #284678 | 0.100 |
| Deuteranopia (no green cones) | #364A74 | 0.089 |
| Tritanopia (no blue cones) | #634050 | 0.076 |
| Achromatopsia (no color) | #494949 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643676
#643676
oklch(41.9% 0.114 315.7)
- #2E5A0E
#2E5A0E
oklch(42% 0.114 135.5)
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 #643676, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.062
- Blueberry #464196 ΔE 0.076
- Twilight #4E518B ΔE 0.078
- Dusk #4E5481 ΔE 0.084
- Light Eggplant #894585 ΔE 0.086
- Purple #800080 ΔE 0.086
- Grape Purple #5D1451 ΔE 0.089
Use #643676 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.