#644C77
Closest named color: Dusty Grape (#545775). oklch(45.9% 0.074 309.3), rgb(100, 76, 119).
Aa
White text reads best on this color (7.38:1).
About this color
#644C77 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.074 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.040 away. White text reads best on it, at 7.38:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.074) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.84:1 |
| White text | 7.38:1 |
Values
| HEX | #644C77 |
| RGB | rgb(100, 76, 119) |
| HSL | hsl(273, 22%, 38%) |
| OKLCH | oklch(45.9% 0.074 309.3) |
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 #644C77 | 7.38:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #644C77 | 2.84:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #644C77 text on white | 7.38:1 | AAA | Lc 85.6 | Fine for body text |
| #644C77 text on black | 2.84:1 | Fails | Lc -16.4 | 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
#DDD6E3
oklch(88.5% 0.019 309.8)
-
Step 300
300
#C7BBD2
oklch(80.9% 0.034 308.9)
-
Step 400
400
#AB97BC
oklch(70.6% 0.057 309.3)
-
Step 500
500
#977DAB
oklch(63% 0.074 310)
-
Step 600
600
#816697
oklch(55.6% 0.08 309.1)
-
Step 700
700 (this color)
#644C77
oklch(45.9% 0.074 309.3)
-
Step 800
800
#594668
oklch(42.8% 0.06 309.5)
-
Step 900
900
#493B55
oklch(37.8% 0.047 308.8)
-
Step 950
950
#2B2232
oklch(26.9% 0.032 309.9)
#644C77 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) | #445479 | 0.053 |
| Deuteranopia (no green cones) | #495676 | 0.050 |
| Tritanopia (no blue cones) | #62525C | 0.053 |
| Achromatopsia (no color) | #565656 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C77
#644C77
oklch(45.9% 0.074 309.3)
- #4B6032
#4B6032
oklch(46% 0.074 129)
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 #644C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.040
- Dusk #4E5481 ΔE 0.041
- Twilight #4E518B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.064
- Muted Purple #805B87 ΔE 0.069
- Dull Purple #84597E ΔE 0.070
- Brownish Purple #76424E ΔE 0.071
- Dusky Blue #475F94 ΔE 0.071
Use #644C77 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.