#644F81
Closest named color: Dusk (#4E5481). oklch(47% 0.082 302.7), rgb(100, 79, 129).
Aa
White text reads best on this color (7.05:1).
About this color
#644F81 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.082 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.037 away. White text reads best on it, at 7.05:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #644F81 |
| RGB | rgb(100, 79, 129) |
| HSL | hsl(265, 24%, 41%) |
| OKLCH | oklch(47% 0.082 302.7) |
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 #644F81 | 7.05:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #644F81 | 2.97:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #644F81 text on white | 7.05:1 | AAA | Lc 84.4 | Fine for body text |
| #644F81 text on black | 2.97:1 | Fails | Lc -17.6 | 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
#EBE8F0
oklch(93.6% 0.011 303.1)
-
Step 200
200
#DCD6E6
oklch(88.6% 0.023 302.9)
-
Step 300
300
#C5BBD6
oklch(80.9% 0.039 302.4)
-
Step 400
400
#A897C2
oklch(70.6% 0.064 302.8)
-
Step 500
500
#937EB2
oklch(63.2% 0.08 302.7)
-
Step 600
600
#7D669E
oklch(55.5% 0.089 302.5)
-
Step 700
700 (this color)
#644F81
oklch(47% 0.082 302.7)
-
Step 800
800
#56466E
oklch(42.8% 0.067 302)
-
Step 900
900
#473B59
oklch(37.8% 0.052 302.3)
-
Step 950
950
#2A2234
oklch(26.9% 0.035 304.5)
#644F81 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) | #435883 | 0.053 |
| Deuteranopia (no green cones) | #485880 | 0.048 |
| Tritanopia (no blue cones) | #5F5762 | 0.063 |
| Achromatopsia (no color) | #595959 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F81
#644F81
oklch(47% 0.082 302.7)
- #52622A
#52622A
oklch(46.9% 0.083 122.9)
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 #644F81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.037
- Twilight #4E518B ΔE 0.038
- Dusty Grape #545775 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.060
- Muted Purple #805B87 ΔE 0.062
- YInMn Blue #415A77 ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.066
- Dull Purple #84597E ΔE 0.066
Use #644F81 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.