#644A79
Closest named color: Dusk (#4E5481). oklch(45.6% 0.08 308.9), rgb(100, 74, 121).
Aa
White text reads best on this color (7.50:1).
About this color
#644A79 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.080 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.043 away. White text reads best on it, at 7.50:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #644A79 |
| RGB | rgb(100, 74, 121) |
| HSL | hsl(273, 24%, 38%) |
| OKLCH | oklch(45.6% 0.08 308.9) |
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 #644A79 | 7.50:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #644A79 | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #644A79 text on white | 7.50:1 | AAA | Lc 86.0 | Fine for body text |
| #644A79 text on black | 2.79:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#ECE8F1
oklch(93.7% 0.013 306)
-
Step 200
200
#DED5E7
oklch(88.6% 0.026 308.1)
-
Step 300
300
#C9B9D8
oklch(80.9% 0.046 308.5)
-
Step 400
400
#AE94C5
oklch(70.7% 0.076 308.6)
-
Step 500
500
#9A79B6
oklch(63.1% 0.096 308.6)
-
Step 600
600
#8561A2
oklch(55.6% 0.105 308.8)
-
Step 700
700
#71508A
oklch(49.1% 0.097 309.4)
-
Step 800
800 (this color)
#644A79
oklch(45.6% 0.08 308.9)
-
Step 900
900
#4B385B
oklch(37.7% 0.063 308.5)
-
Step 950
950
#2C2135
oklch(27% 0.039 309.1)
#644A79 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) | #41537B | 0.058 |
| Deuteranopia (no green cones) | #475578 | 0.054 |
| Tritanopia (no blue cones) | #61515C | 0.058 |
| Achromatopsia (no color) | #555555 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A79
#644A79
oklch(45.6% 0.08 308.9)
- #49602D
#49602D
oklch(45.7% 0.081 129.2)
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 #644A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.043
- Dusty Grape #545775 ΔE 0.046
- Twilight #4E518B ΔE 0.046
- YInMn Blue #415A77 ΔE 0.068
- Light Eggplant #894585 ΔE 0.072
- Muted Purple #805B87 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.073
- Dusky Blue #475F94 ΔE 0.073
Use #644A79 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.