#644F71
Closest named color: Dusty Grape (#545775). oklch(46.2% 0.06 312.1), rgb(100, 79, 113).
Aa
White text reads best on this color (7.24:1).
About this color
#644F71 is a medium-dark, muted purple. In OKLCH its lightness is 46%, its chroma 0.060 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.032 away. White text reads best on it, at 7.24:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #644F71 |
| RGB | rgb(100, 79, 113) |
| HSL | hsl(277, 18%, 38%) |
| OKLCH | oklch(46.2% 0.06 312.1) |
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 #644F71 | 7.24:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #644F71 | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #644F71 text on white | 7.24:1 | AAA | Lc 85.1 | Fine for body text |
| #644F71 text on black | 2.89:1 | Fails | Lc -16.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#ECE8EE
oklch(93.6% 0.009 314.8)
-
Step 200
200
#DDD6E1
oklch(88.5% 0.017 313.6)
-
Step 300
300
#C7BCCE
oklch(81% 0.028 312.5)
-
Step 400
400
#AA99B6
oklch(70.7% 0.046 311.3)
-
Step 500
500
#967FA4
oklch(63.1% 0.06 312.5)
-
Step 600
600
#80698F
oklch(55.7% 0.064 311.7)
-
Step 700
700 (this color)
#644F71
oklch(46.2% 0.06 312.1)
-
Step 800
800
#584763
oklch(42.7% 0.05 311.8)
-
Step 900
900
#493C51
oklch(37.8% 0.039 312.4)
-
Step 950
950
#2A232F
oklch(26.9% 0.024 311)
#644F71 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) | #4A5672 | 0.044 |
| Deuteranopia (no green cones) | #4E5770 | 0.041 |
| Tritanopia (no blue cones) | #63535B | 0.042 |
| Achromatopsia (no color) | #575757 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F71
#644F71
oklch(46.2% 0.06 312.1)
- #4C603D
#4C603D
oklch(46.3% 0.059 132.5)
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 #644F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.032
- Dusk #4E5481 ΔE 0.042
- Twilight #4E518B ΔE 0.054
- YInMn Blue #415A77 ΔE 0.058
- Brownish Purple #76424E ΔE 0.063
- Dark Mauve #874C62 ΔE 0.067
- Dull Purple #84597E ΔE 0.067
- Muted Purple #805B87 ΔE 0.068
Use #644F71 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.