#644B73
Closest named color: Dusty Grape (#545775). oklch(45.5% 0.07 312.3), rgb(100, 75, 115).
Aa
White text reads best on this color (7.51:1).
About this color
#644B73 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.070 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.041 away. White text reads best on it, at 7.51:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.070) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #644B73 |
| RGB | rgb(100, 75, 115) |
| HSL | hsl(278, 21%, 37%) |
| OKLCH | oklch(45.5% 0.07 312.3) |
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 #644B73 | 7.51:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #644B73 | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #644B73 text on white | 7.51:1 | AAA | Lc 86.0 | Fine for body text |
| #644B73 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DED5E4
oklch(88.5% 0.022 312.2)
-
Step 300
300
#CAB9D4
oklch(80.8% 0.042 313.1)
-
Step 400
400
#AF95BF
oklch(70.7% 0.067 312.4)
-
Step 500
500
#9B7BAE
oklch(63.2% 0.083 312.5)
-
Step 600
600
#85639A
oklch(55.5% 0.091 311.9)
-
Step 700
700
#715283
oklch(49.1% 0.084 312.5)
-
Step 800
800 (this color)
#644B73
oklch(45.5% 0.07 312.3)
-
Step 900
900
#4B3957
oklch(37.7% 0.055 311.3)
-
Step 950
950
#2C2133
oklch(26.9% 0.036 311.8)
#644B73 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) | #445375 | 0.053 |
| Deuteranopia (no green cones) | #4A5572 | 0.049 |
| Tritanopia (no blue cones) | #63505A | 0.048 |
| Achromatopsia (no color) | #555555 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B73
#644B73
oklch(45.5% 0.07 312.3)
- #485F35
#485F35
oklch(45.5% 0.07 132)
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 #644B73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.041
- Dusk #4E5481 ΔE 0.044
- Twilight #4E518B ΔE 0.051
- YInMn Blue #415A77 ΔE 0.064
- Brownish Purple #76424E ΔE 0.065
- Dark Mauve #874C62 ΔE 0.071
- Muted Purple #805B87 ΔE 0.073
- Dull Purple #84597E ΔE 0.073
Use #644B73 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.