#644A71
Closest named color: Dusty Grape (#545775). oklch(45.2% 0.069 314.1), rgb(100, 74, 113).
Aa
White text reads best on this color (7.60:1).
About this color
#644A71 is a medium-dark, muted purple. In OKLCH its lightness is 45%, its chroma 0.069 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 0.042 away. White text reads best on it, at 7.60:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.069) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.75:1 |
| White text | 7.60:1 |
Values
| HEX | #644A71 |
| RGB | rgb(100, 74, 113) |
| HSL | hsl(280, 21%, 37%) |
| OKLCH | oklch(45.2% 0.069 314.1) |
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 #644A71 | 7.60:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #644A71 | 2.75:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #644A71 text on white | 7.60:1 | AAA | Lc 86.4 | Fine for body text |
| #644A71 text on black | 2.75:1 | 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#EDE8EF
oklch(93.7% 0.011 316.5)
-
Step 200
200
#DFD5E4
oklch(88.5% 0.023 314.7)
-
Step 300
300
#CAB9D3
oklch(80.8% 0.04 314.1)
-
Step 400
400
#B095BD
oklch(70.7% 0.065 314.7)
-
Step 500
500
#9C7AAD
oklch(63% 0.084 314.2)
-
Step 600
600
#876398
oklch(55.7% 0.09 314.5)
-
Step 700
700
#725282
oklch(49.1% 0.083 314)
-
Step 800
800 (this color)
#644A71
oklch(45.2% 0.069 314.1)
-
Step 900
900
#4C3956
oklch(37.7% 0.054 313.6)
-
Step 950
950
#2D2132
oklch(27% 0.035 315.8)
#644A71 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) | #445273 | 0.054 |
| Deuteranopia (no green cones) | #4A5470 | 0.049 |
| Tritanopia (no blue cones) | #634F58 | 0.048 |
| Achromatopsia (no color) | #545454 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A71
#644A71
oklch(45.2% 0.069 314.1)
- #465E36
#465E36
oklch(45.1% 0.068 133.7)
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 #644A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.042
- Dusk #4E5481 ΔE 0.046
- Twilight #4E518B ΔE 0.054
- Brownish Purple #76424E ΔE 0.063
- YInMn Blue #415A77 ΔE 0.066
- Dark Mauve #874C62 ΔE 0.071
- Dull Purple #84597E ΔE 0.075
- Muted Purple #805B87 ΔE 0.075
Use #644A71 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.