#644D77
Closest named color: Dusty Grape (#545775). oklch(46.1% 0.072 308.8), rgb(100, 77, 119).
Aa
White text reads best on this color (7.31:1).
About this color
#644D77 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.072 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.038 away. White text reads best on it, at 7.31:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.072) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.86:1 |
| White text | 7.31:1 |
Values
| HEX | #644D77 |
| RGB | rgb(100, 77, 119) |
| HSL | hsl(273, 21%, 38%) |
| OKLCH | oklch(46.1% 0.072 308.8) |
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 #644D77 | 7.31:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #644D77 | 2.86:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #644D77 text on white | 7.31:1 | AAA | Lc 85.4 | Fine for body text |
| #644D77 text on black | 2.86:1 | Fails | Lc -16.7 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#ECE8EF
oklch(93.6% 0.01 311.2)
-
Step 200
200
#DDD6E3
oklch(88.5% 0.019 309.8)
-
Step 300
300
#C7BBD2
oklch(80.9% 0.034 308.9)
-
Step 400
400
#AB98BC
oklch(70.8% 0.056 308.8)
-
Step 500
500
#967EAB
oklch(63.1% 0.071 308.7)
-
Step 600
600
#806796
oklch(55.6% 0.077 308.3)
-
Step 700
700 (this color)
#644D77
oklch(46.1% 0.072 308.8)
-
Step 800
800
#584668
oklch(42.7% 0.059 308.2)
-
Step 900
900
#493B54
oklch(37.7% 0.045 309.7)
-
Step 950
950
#2B2331
oklch(27.1% 0.028 310.4)
#644D77 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) | #455579 | 0.051 |
| Deuteranopia (no green cones) | #4A5776 | 0.048 |
| Tritanopia (no blue cones) | #62535C | 0.053 |
| Achromatopsia (no color) | #565656 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644D77
#644D77
oklch(46.1% 0.072 308.8)
- #4C6033
#4C6033
oklch(46.1% 0.072 128.5)
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 #644D77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.038
- Dusk #4E5481 ΔE 0.040
- Twilight #4E518B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.062
- Muted Purple #805B87 ΔE 0.068
- Dull Purple #84597E ΔE 0.069
- Dusky Blue #475F94 ΔE 0.070
- Brownish Purple #76424E ΔE 0.071
Use #644D77 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.