#644371
Closest named color: Dusk (#4E5481). oklch(43.9% 0.083 316), rgb(100, 67, 113).
Aa
White text reads best on this color (8.12:1).
About this color
#644371 is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.083 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.057 away. White text reads best on it, at 8.12:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.083) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.58:1 |
| White text | 8.12:1 |
Values
| HEX | #644371 |
| RGB | rgb(100, 67, 113) |
| HSL | hsl(283, 26%, 35%) |
| OKLCH | oklch(43.9% 0.083 316) |
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 #644371 | 8.12:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #644371 | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #644371 text on white | 8.12:1 | AAA | Lc 88.0 | Fine for body text |
| #644371 text on black | 2.58:1 | Fails | Lc -14.1 | 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
#EEE7F0
oklch(93.6% 0.014 318.7)
-
Step 200
200
#E0D4E5
oklch(88.5% 0.026 316.1)
-
Step 300
300
#CDB8D6
oklch(81% 0.047 315.8)
-
Step 400
400
#B492C2
oklch(70.7% 0.078 316)
-
Step 500
500
#A176B2
oklch(63% 0.1 316.1)
-
Step 600
600
#8C5E9E
oklch(55.6% 0.109 316.1)
-
Step 700
700
#774E87
oklch(49.2% 0.1 316.1)
-
Step 800
800 (this color)
#644371
oklch(43.9% 0.083 316)
-
Step 900
900
#4F3659
oklch(37.6% 0.066 316)
-
Step 950
950
#2E2034
oklch(27% 0.041 315.5)
#644371 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) | #3C4D73 | 0.068 |
| Deuteranopia (no green cones) | #445170 | 0.063 |
| Tritanopia (no blue cones) | #644954 | 0.056 |
| Achromatopsia (no color) | #4F4F4F | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644371
#644371
oklch(43.9% 0.083 316)
- #3C5C2C
#3C5C2C
oklch(43.7% 0.083 136.1)
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 #644371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.057
- Dusty Grape #545775 ΔE 0.059
- Twilight #4E518B ΔE 0.060
- Brownish Purple #76424E ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.071
- Light Eggplant #894585 ΔE 0.077
- YInMn Blue #415A77 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.080
Use #644371 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.