#644571
Closest named color: Dusk (#4E5481). oklch(44.3% 0.079 315.5), rgb(100, 69, 113).
Aa
White text reads best on this color (7.98:1).
About this color
#644571 is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.079 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.053 away. White text reads best on it, at 7.98:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.079) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.63:1 |
| White text | 7.98:1 |
Values
| HEX | #644571 |
| RGB | rgb(100, 69, 113) |
| HSL | hsl(282, 24%, 36%) |
| OKLCH | oklch(44.3% 0.079 315.5) |
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 #644571 | 7.98:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #644571 | 2.63:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #644571 text on white | 7.98:1 | AAA | Lc 87.6 | Fine for body text |
| #644571 text on black | 2.63:1 | Fails | Lc -14.6 | 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#EDE7F0
oklch(93.5% 0.014 314.8)
-
Step 200
200
#E0D4E5
oklch(88.5% 0.026 316.1)
-
Step 300
300
#CCB8D5
oklch(80.8% 0.046 315.4)
-
Step 400
400
#B393C0
oklch(70.8% 0.073 316.1)
-
Step 500
500
#A078B1
oklch(63.2% 0.095 315.5)
-
Step 600
600
#8A609C
oklch(55.6% 0.102 315.3)
-
Step 700
700
#754F86
oklch(49.1% 0.096 314.9)
-
Step 800
800 (this color)
#644571
oklch(44.3% 0.079 315.5)
-
Step 900
900
#4E3758
oklch(37.7% 0.062 315.3)
-
Step 950
950
#2E2033
oklch(26.9% 0.04 317)
#644571 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) | #3E4F73 | 0.065 |
| Deuteranopia (no green cones) | #465270 | 0.059 |
| Tritanopia (no blue cones) | #634B55 | 0.055 |
| Achromatopsia (no color) | #515151 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644571
#644571
oklch(44.3% 0.079 315.5)
- #3F5D2F
#3F5D2F
oklch(44.3% 0.079 135.6)
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 #644571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.053
- Dusty Grape #545775 ΔE 0.054
- Twilight #4E518B ΔE 0.057
- Brownish Purple #76424E ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.074
- YInMn Blue #415A77 ΔE 0.075
- Light Eggplant #894585 ΔE 0.077
- Dark Mauve #874C62 ΔE 0.077
Use #644571 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.