#645B72
Closest named color: Dusty Grape (#545775). oklch(48.8% 0.038 302.8), rgb(100, 91, 114).
Aa
White text reads best on this color (6.39:1).
About this color
#645B72 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.038 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.030 away. White text reads best on it, at 6.39:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #645B72 |
| RGB | rgb(100, 91, 114) |
| HSL | hsl(263, 11%, 40%) |
| OKLCH | oklch(48.8% 0.038 302.8) |
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 #645B72 | 6.39:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #645B72 | 3.28:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #645B72 text on white | 6.39:1 | AA | Lc 81.8 | Fine for body text |
| #645B72 text on black | 3.28:1 | AA large text | Lc -20.1 | 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 700.
-
Step 50
50
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#DAD8DF
oklch(88.6% 0.01 299.2)
-
Step 300
300
#C3BECB
oklch(80.9% 0.019 303.4)
-
Step 400
400
#A49DB0
oklch(70.8% 0.028 302.4)
-
Step 500
500
#8E849D
oklch(63.1% 0.039 303.5)
-
Step 600
600
#786E87
oklch(55.6% 0.04 303.3)
-
Step 700
700 (this color)
#645B72
oklch(48.8% 0.038 302.8)
-
Step 800
800
#524B5D
oklch(42.7% 0.031 302.8)
-
Step 900
900
#443F4D
oklch(37.8% 0.024 301.5)
-
Step 950
950
#28252D
oklch(27.1% 0.015 302.4)
#645B72 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) | #575F73 | 0.022 |
| Deuteranopia (no green cones) | #585F71 | 0.021 |
| Tritanopia (no blue cones) | #625E63 | 0.029 |
| Achromatopsia (no color) | #5F5F5F | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B72
#645B72
oklch(48.8% 0.038 302.8)
- #5C644C
#5C644C
oklch(48.9% 0.038 122.8)
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 #645B72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.030
- Slate #516572 ΔE 0.039
- Dim Gray #696969 ΔE 0.050
- Dusk #4E5481 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.052
- Dull Purple #84597E ΔE 0.059
- Muted Purple #805B87 ΔE 0.060
- Dusty Purple #825F87 ΔE 0.062
Use #645B72 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.