#644C79
Closest named color: Dusk (#4E5481). oklch(46% 0.077 308.1), rgb(100, 76, 121).
Aa
White text reads best on this color (7.36:1).
About this color
#644C79 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.077 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.040 away. White text reads best on it, at 7.36:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.077) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #644C79 |
| RGB | rgb(100, 76, 121) |
| HSL | hsl(272, 23%, 39%) |
| OKLCH | oklch(46% 0.077 308.1) |
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 #644C79 | 7.36:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #644C79 | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #644C79 text on white | 7.36:1 | AAA | Lc 85.5 | Fine for body text |
| #644C79 text on black | 2.85:1 | 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
#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
#C7BBD4
oklch(81% 0.037 307.1)
-
Step 400
400
#AB97BE
oklch(70.7% 0.06 308.1)
-
Step 500
500
#967DAD
oklch(63% 0.076 308)
-
Step 600
600
#816699
oklch(55.6% 0.083 308.1)
-
Step 700
700 (this color)
#644C79
oklch(46% 0.077 308.1)
-
Step 800
800
#59456A
oklch(42.7% 0.064 308.6)
-
Step 900
900
#493A56
oklch(37.6% 0.05 308.5)
-
Step 950
950
#2B2232
oklch(26.9% 0.032 309.9)
#644C79 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) | #43557B | 0.055 |
| Deuteranopia (no green cones) | #485678 | 0.051 |
| Tritanopia (no blue cones) | #61535D | 0.056 |
| Achromatopsia (no color) | #565656 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C79
#644C79
oklch(46% 0.077 308.1)
- #4B6030
#4B6030
oklch(45.9% 0.076 128.5)
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 #644C79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.040
- Dusty Grape #545775 ΔE 0.041
- Twilight #4E518B ΔE 0.045
- YInMn Blue #415A77 ΔE 0.064
- Muted Purple #805B87 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.070
- Dull Purple #84597E ΔE 0.070
- Light Eggplant #894585 ΔE 0.072
Use #644C79 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.