#644A78
Closest named color: Dusk (#4E5481). oklch(45.6% 0.079 309.5), rgb(100, 74, 120).
Aa
White text reads best on this color (7.51:1).
About this color
#644A78 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.079 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 7.51:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.079) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #644A78 |
| RGB | rgb(100, 74, 120) |
| HSL | hsl(274, 24%, 38%) |
| OKLCH | oklch(45.6% 0.079 309.5) |
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 #644A78 | 7.51:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #644A78 | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #644A78 text on white | 7.51:1 | AAA | Lc 86.1 | Fine for body text |
| #644A78 text on black | 2.79:1 | Fails | Lc -16.0 | 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
#DED5E6
oklch(88.5% 0.025 309.3)
-
Step 300
300
#C9B9D8
oklch(80.9% 0.046 308.5)
-
Step 400
400
#AE94C4
oklch(70.6% 0.074 309.1)
-
Step 500
500
#9B79B5
oklch(63.1% 0.095 309.7)
-
Step 600
600
#8562A0
oklch(55.6% 0.101 309.3)
-
Step 700
700
#715089
oklch(49% 0.096 309.9)
-
Step 800
800 (this color)
#644A78
oklch(45.6% 0.079 309.5)
-
Step 900
900
#4B385A
oklch(37.6% 0.061 309.3)
-
Step 950
950
#2C2135
oklch(27% 0.039 309.1)
#644A78 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) | #41537A | 0.058 |
| Deuteranopia (no green cones) | #475577 | 0.054 |
| Tritanopia (no blue cones) | #62515B | 0.058 |
| Achromatopsia (no color) | #545454 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A78
#644A78
oklch(45.6% 0.079 309.5)
- #495F2E
#495F2E
oklch(45.5% 0.078 129)
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 #644A78, 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 0.045
- Twilight #4E518B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.068
- Light Eggplant #894585 ΔE 0.072
- Muted Purple #805B87 ΔE 0.072
- Brownish Purple #76424E ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.074
Use #644A78 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.