#644D78
Closest named color: Dusty Grape (#545775). oklch(46.2% 0.073 308.2), rgb(100, 77, 120).
Aa
White text reads best on this color (7.30:1).
About this color
#644D78 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.073 and its hue 308°. 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 7.30:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.073) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #644D78 |
| RGB | rgb(100, 77, 120) |
| HSL | hsl(272, 22%, 39%) |
| OKLCH | oklch(46.2% 0.073 308.2) |
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 #644D78 | 7.30:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #644D78 | 2.87:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #644D78 text on white | 7.30:1 | AAA | Lc 85.3 | Fine for body text |
| #644D78 text on black | 2.87:1 | 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
#C7BBD3
oklch(80.9% 0.036 308)
-
Step 400
400
#AA98BC
oklch(70.7% 0.055 307.6)
-
Step 500
500
#967EAC
oklch(63.2% 0.073 308.1)
-
Step 600
600
#806797
oklch(55.6% 0.078 307.8)
-
Step 700
700 (this color)
#644D78
oklch(46.2% 0.073 308.2)
-
Step 800
800
#584669
oklch(42.7% 0.061 307.5)
-
Step 900
900
#493B55
oklch(37.8% 0.047 308.8)
-
Step 950
950
#2B2332
oklch(27.2% 0.029 308.7)
#644D78 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) | #45557A | 0.051 |
| Deuteranopia (no green cones) | #4A5777 | 0.048 |
| Tritanopia (no blue cones) | #61535D | 0.053 |
| Achromatopsia (no color) | #565656 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644D78
#644D78
oklch(46.2% 0.073 308.2)
- #4C6032
#4C6032
oklch(46.1% 0.073 128.2)
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 #644D78, 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 0.039
- Twilight #4E518B ΔE 0.046
- YInMn Blue #415A77 ΔE 0.062
- Muted Purple #805B87 ΔE 0.067
- Dull Purple #84597E ΔE 0.069
- Dusky Blue #475F94 ΔE 0.069
- Brownish Purple #76424E ΔE 0.072
Use #644D78 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.