#644B6B
Closest named color: Dusty Grape (#545775). oklch(45.2% 0.06 318.7), rgb(100, 75, 107).
Aa
White text reads best on this color (7.60:1).
About this color
#644B6B is a medium-dark, muted purple. In OKLCH its lightness is 45%, its chroma 0.060 and its hue 319°. 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 7.60:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.76:1 |
| White text | 7.60:1 |
Values
| HEX | #644B6B |
| RGB | rgb(100, 75, 107) |
| HSL | hsl(287, 18%, 36%) |
| OKLCH | oklch(45.2% 0.06 318.7) |
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 #644B6B | 7.60:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #644B6B | 2.76:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #644B6B text on white | 7.60:1 | AAA | Lc 86.4 | Fine for body text |
| #644B6B text on black | 2.76:1 | Fails | Lc -15.7 | 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
#F7F4F7
oklch(97% 0.005 325.6)
-
Step 100
100
#EDE8EE
oklch(93.7% 0.01 320.5)
-
Step 200
200
#DFD5E1
oklch(88.5% 0.019 320.6)
-
Step 300
300
#CBBACF
oklch(81% 0.035 319.8)
-
Step 400
400
#B096B7
oklch(70.7% 0.056 319)
-
Step 500
500
#9C7CA5
oklch(63.1% 0.07 318.7)
-
Step 600
600
#876590
oklch(55.7% 0.076 319.1)
-
Step 700
700
#72537B
oklch(49% 0.073 318.5)
-
Step 800
800 (this color)
#644B6B
oklch(45.2% 0.06 318.7)
-
Step 900
900
#4C3A51
oklch(37.7% 0.045 318.8)
-
Step 950
950
#2D2230
oklch(27.1% 0.03 318.9)
#644B6B 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) | #47526C | 0.049 |
| Deuteranopia (no green cones) | #4D556A | 0.046 |
| Tritanopia (no blue cones) | #644F56 | 0.040 |
| Achromatopsia (no color) | #545454 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B6B
#644B6B
oklch(45.2% 0.06 318.7)
- #455E3D
#455E3D
oklch(45.2% 0.06 138.3)
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 #644B6B, 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 0.050
- Brownish Purple #76424E ΔE 0.055
- Twilight #4E518B ΔE 0.061
- YInMn Blue #415A77 ΔE 0.064
- Dark Mauve #874C62 ΔE 0.067
- Purple Brown #673A3F ΔE 0.073
- Dull Purple #84597E ΔE 0.075
Use #644B6B 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.