#644B7D
Closest named color: Dusk (#4E5481). oklch(46% 0.084 306.4), rgb(100, 75, 125).
Aa
White text reads best on this color (7.38:1).
About this color
#644B7D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.084 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.041 away. White text reads best on it, at 7.38:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.84:1 |
| White text | 7.38:1 |
Values
| HEX | #644B7D |
| RGB | rgb(100, 75, 125) |
| HSL | hsl(270, 25%, 39%) |
| OKLCH | oklch(46% 0.084 306.4) |
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 #644B7D | 7.38:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #644B7D | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #644B7D text on white | 7.38:1 | AAA | Lc 85.6 | Fine for body text |
| #644B7D text on black | 2.84:1 | Fails | Lc -16.5 | 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
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DDD6E5
oklch(88.6% 0.022 306.8)
-
Step 300
300
#C7BAD6
oklch(80.8% 0.041 306.4)
-
Step 400
400
#AB96C1
oklch(70.6% 0.066 306.9)
-
Step 500
500
#967CB1
oklch(63% 0.083 306.6)
-
Step 600
600
#81659D
oklch(55.6% 0.09 306.6)
-
Step 700
700 (this color)
#644B7D
oklch(46% 0.084 306.4)
-
Step 800
800
#59456D
oklch(42.8% 0.069 306.6)
-
Step 900
900
#493A58
oklch(37.7% 0.053 306.9)
-
Step 950
950
#2B2234
oklch(27% 0.035 307)
#644B7D 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) | #40557F | 0.059 |
| Deuteranopia (no green cones) | #46567C | 0.054 |
| Tritanopia (no blue cones) | #60535E | 0.063 |
| Achromatopsia (no color) | #565656 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B7D
#644B7D
oklch(46% 0.084 306.4)
- #4C6029
#4C6029
oklch(45.9% 0.084 126.1)
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 #644B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.041
- Twilight #4E518B ΔE 0.042
- Dusty Grape #545775 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.069
- Muted Purple #805B87 ΔE 0.069
- Light Eggplant #894585 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.071
Use #644B7D 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.