#644F66
Closest named color: Dusty Grape (#545775). oklch(45.8% 0.045 323.4), rgb(100, 79, 102).
Aa
White text reads best on this color (7.36:1).
About this color
#644F66 is a medium-dark, muted purple. In OKLCH its lightness is 46%, its chroma 0.045 and its hue 323°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.036 away. White text reads best on it, at 7.36:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #644F66 |
| RGB | rgb(100, 79, 102) |
| HSL | hsl(295, 13%, 35%) |
| OKLCH | oklch(45.8% 0.045 323.4) |
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 #644F66 | 7.36:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #644F66 | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #644F66 text on white | 7.36:1 | AAA | Lc 85.6 | Fine for body text |
| #644F66 text on black | 2.85:1 | Fails | Lc -16.5 | 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
#F7F5F7
oklch(97.2% 0.003 325.6)
-
Step 100
100
#ECE8ED
oklch(93.6% 0.008 319.4)
-
Step 200
200
#DED6DF
oklch(88.5% 0.015 322.3)
-
Step 300
300
#C9BBCB
oklch(80.8% 0.027 322)
-
Step 400
400
#AE98B0
oklch(70.7% 0.042 323.4)
-
Step 500
500
#9A7F9C
oklch(63.1% 0.053 324)
-
Step 600
600
#846887
oklch(55.6% 0.058 323.1)
-
Step 700
700
#705673
oklch(49% 0.055 322.9)
-
Step 800
800 (this color)
#644F66
oklch(45.8% 0.045 323.4)
-
Step 900
900
#4B3B4C
oklch(37.6% 0.035 324.4)
-
Step 950
950
#2C232D
oklch(27.1% 0.022 322.9)
#644F66 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) | #4D5467 | 0.039 |
| Deuteranopia (no green cones) | #525765 | 0.036 |
| Tritanopia (no blue cones) | #655157 | 0.027 |
| Achromatopsia (no color) | #565656 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F66
#644F66
oklch(45.8% 0.045 323.4)
- #485E47
#485E47
oklch(45.7% 0.045 143.7)
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 #644F66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.036
- Brownish Purple #76424E ΔE 0.051
- Dusk #4E5481 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.060
- Dark Mauve #874C62 ΔE 0.063
- Slate #516572 ΔE 0.066
- Twilight #4E518B ΔE 0.068
- Purple Brown #673A3F ΔE 0.072
Use #644F66 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.