#644D79
Closest named color: Dusk (#4E5481). oklch(46.2% 0.075 307.7), rgb(100, 77, 121).
Aa
White text reads best on this color (7.29:1).
About this color
#644D79 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.075 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.039 away. White text reads best on it, at 7.29:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.075) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.87:1 |
| White text | 7.29:1 |
Values
| HEX | #644D79 |
| RGB | rgb(100, 77, 121) |
| HSL | hsl(271, 22%, 39%) |
| OKLCH | oklch(46.2% 0.075 307.7) |
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 #644D79 | 7.29:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #644D79 | 2.87:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #644D79 text on white | 7.29:1 | AAA | Lc 85.3 | Fine for body text |
| #644D79 text on black | 2.87:1 | Fails | Lc -16.8 | 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
#DDD6E4
oklch(88.6% 0.02 308.2)
-
Step 300
300
#C7BBD3
oklch(80.9% 0.036 308)
-
Step 400
400
#AA97BD
oklch(70.6% 0.058 307.5)
-
Step 500
500
#967EAC
oklch(63.2% 0.073 308.1)
-
Step 600
600
#806698
oklch(55.5% 0.081 307.7)
-
Step 700
700 (this color)
#644D79
oklch(46.2% 0.075 307.7)
-
Step 800
800
#584669
oklch(42.7% 0.061 307.5)
-
Step 900
900
#493B56
oklch(37.8% 0.048 307.8)
-
Step 950
950
#2A2232
oklch(26.8% 0.031 307.2)
#644D79 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) | #44557B | 0.052 |
| Deuteranopia (no green cones) | #495778 | 0.049 |
| Tritanopia (no blue cones) | #61535D | 0.055 |
| Achromatopsia (no color) | #565656 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644D79
#644D79
oklch(46.2% 0.075 307.7)
- #4D6031
#4D6031
oklch(46.1% 0.074 127.1)
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 #644D79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.039
- Dusty Grape #545775 ΔE 0.039
- Twilight #4E518B ΔE 0.045
- YInMn Blue #415A77 ΔE 0.063
- Muted Purple #805B87 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.068
- Dull Purple #84597E ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.072
Use #644D79 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.