#644C70
Closest named color: Dusty Grape (#545775). oklch(45.6% 0.064 314.1), rgb(100, 76, 112).
Aa
White text reads best on this color (7.47:1).
About this color
#644C70 is a medium-dark, muted purple. In OKLCH its lightness is 46%, its chroma 0.064 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.038 away. White text reads best on it, at 7.47:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #644C70 |
| RGB | rgb(100, 76, 112) |
| HSL | hsl(280, 19%, 37%) |
| OKLCH | oklch(45.6% 0.064 314.1) |
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 #644C70 | 7.47:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #644C70 | 2.80:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #644C70 text on white | 7.47:1 | AAA | Lc 85.9 | Fine for body text |
| #644C70 text on black | 2.80:1 | Fails | Lc -16.1 | 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
#ECE8EF
oklch(93.6% 0.01 311.2)
-
Step 200
200
#DED5E3
oklch(88.4% 0.021 313.8)
-
Step 300
300
#CABAD2
oklch(81% 0.038 314.6)
-
Step 400
400
#AE96BB
oklch(70.7% 0.059 313.7)
-
Step 500
500
#9B7CAA
oklch(63.2% 0.076 314.5)
-
Step 600
600
#856496
oklch(55.5% 0.084 313.8)
-
Step 700
700
#715380
oklch(49.1% 0.078 314)
-
Step 800
800 (this color)
#644C70
oklch(45.6% 0.064 314.1)
-
Step 900
900
#4B3A54
oklch(37.7% 0.049 313.7)
-
Step 950
950
#2C2231
oklch(27% 0.031 314.3)
#644C70 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) | #475371 | 0.049 |
| Deuteranopia (no green cones) | #4C566F | 0.047 |
| Tritanopia (no blue cones) | #635059 | 0.044 |
| Achromatopsia (no color) | #555555 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C70
#644C70
oklch(45.6% 0.064 314.1)
- #485F3A
#485F3A
oklch(45.6% 0.064 134.3)
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 #644C70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.038
- Dusk #4E5481 ΔE 0.045
- Twilight #4E518B ΔE 0.055
- Brownish Purple #76424E ΔE 0.061
- YInMn Blue #415A77 ΔE 0.062
- Dark Mauve #874C62 ΔE 0.068
- Dull Purple #84597E ΔE 0.072
- Muted Purple #805B87 ΔE 0.073
Use #644C70 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.