#644C7F
Closest named color: Dusk (#4E5481). oklch(46.3% 0.085 305), rgb(100, 76, 127).
Aa
White text reads best on this color (7.28:1).
About this color
#644C7F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.085 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.040 away. White text reads best on it, at 7.28:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.88:1 |
| White text | 7.28:1 |
Values
| HEX | #644C7F |
| RGB | rgb(100, 76, 127) |
| HSL | hsl(268, 25%, 40%) |
| OKLCH | oklch(46.3% 0.085 305) |
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 #644C7F | 7.28:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #644C7F | 2.88:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #644C7F text on white | 7.28:1 | AAA | Lc 85.2 | Fine for body text |
| #644C7F text on black | 2.88:1 | 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
#F6F4F8
oklch(97% 0.006 308.4)
-
Step 100
100
#EBE8F0
oklch(93.6% 0.011 303.1)
-
Step 200
200
#DCD6E6
oklch(88.6% 0.023 302.9)
-
Step 300
300
#C7BAD6
oklch(80.8% 0.041 306.4)
-
Step 400
400
#AA97C2
oklch(70.8% 0.065 304.9)
-
Step 500
500
#957DB3
oklch(63.2% 0.084 304.5)
-
Step 600
600
#80659E
oklch(55.6% 0.091 305.4)
-
Step 700
700 (this color)
#644C7F
oklch(46.3% 0.085 305)
-
Step 800
800
#58456E
oklch(42.8% 0.07 304.9)
-
Step 900
900
#483A59
oklch(37.7% 0.055 304.6)
-
Step 950
950
#2A2234
oklch(26.9% 0.035 304.5)
#644C7F 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) | #405681 | 0.059 |
| Deuteranopia (no green cones) | #46577E | 0.054 |
| Tritanopia (no blue cones) | #60545F | 0.064 |
| Achromatopsia (no color) | #565656 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C7F
#644C7F
oklch(46.3% 0.085 305)
- #4E6128
#4E6128
oklch(46.3% 0.085 125)
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 #644C7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.040
- Twilight #4E518B ΔE 0.040
- Dusty Grape #545775 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.066
- Muted Purple #805B87 ΔE 0.067
- YInMn Blue #415A77 ΔE 0.067
- Light Eggplant #894585 ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.070
Use #644C7F 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.