#644F63
Closest named color: Dusty Grape (#545775). oklch(45.6% 0.042 327.8), rgb(100, 79, 99).
Aa
White text reads best on this color (7.39:1).
About this color
#644F63 is a medium-dark, muted purple. In OKLCH its lightness is 46%, its chroma 0.042 and its hue 328°. 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 7.39:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.042) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.84:1 |
| White text | 7.39:1 |
Values
| HEX | #644F63 |
| RGB | rgb(100, 79, 99) |
| HSL | hsl(303, 12%, 35%) |
| OKLCH | oklch(45.6% 0.042 327.8) |
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 #644F63 | 7.39:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #644F63 | 2.84:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #644F63 text on white | 7.39:1 | AAA | Lc 85.7 | Fine for body text |
| #644F63 text on black | 2.84:1 | Fails | Lc -16.4 | 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
#F7F5F6
oklch(97.2% 0.002 345.2)
-
Step 100
100
#ECE8EC
oklch(93.5% 0.007 325.6)
-
Step 200
200
#DED6DE
oklch(88.5% 0.014 325.7)
-
Step 300
300
#CABBC9
oklch(80.9% 0.026 327.9)
-
Step 400
400
#AE98AD
oklch(70.6% 0.039 327.4)
-
Step 500
500
#9A7F99
oklch(63% 0.05 327.3)
-
Step 600
600
#856884
oklch(55.6% 0.055 327.4)
-
Step 700
700
#71576F
oklch(49.2% 0.05 328.8)
-
Step 800
800 (this color)
#644F63
oklch(45.6% 0.042 327.8)
-
Step 900
900
#4B3C4A
oklch(37.7% 0.031 328.3)
-
Step 950
950
#2C232C
oklch(27% 0.021 326.1)
#644F63 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) | #4E5464 | 0.037 |
| Deuteranopia (no green cones) | #535762 | 0.035 |
| Tritanopia (no blue cones) | #665056 | 0.023 |
| Achromatopsia (no color) | #565656 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F63
#644F63
oklch(45.6% 0.042 327.8)
- #485E4A
#485E4A
oklch(45.8% 0.042 147.3)
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 #644F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.038
- Brownish Purple #76424E ΔE 0.049
- Dusk #4E5481 ΔE 0.057
- YInMn Blue #415A77 ΔE 0.061
- Dark Mauve #874C62 ΔE 0.064
- Slate #516572 ΔE 0.066
- Purple Brown #673A3F ΔE 0.069
- Twilight #4E518B ΔE 0.073
Use #644F63 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.