#645E72
Closest named color: Slate (#516572). oklch(49.5% 0.032 298.9), rgb(100, 94, 114).
Aa
White text reads best on this color (6.20:1).
About this color
#645E72 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.032 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.033 away. White text reads best on it, at 6.20:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.38:1 |
| White text | 6.20:1 |
Values
| HEX | #645E72 |
| RGB | rgb(100, 94, 114) |
| HSL | hsl(258, 10%, 41%) |
| OKLCH | oklch(49.5% 0.032 298.9) |
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 #645E72 | 6.20:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #645E72 | 3.38:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #645E72 text on white | 6.20:1 | AA | Lc 80.9 | Fine for body text |
| #645E72 text on black | 3.38:1 | AA large text | Lc -20.9 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9EC
oklch(93.6% 0.004 301.4)
-
Step 200
200
#DAD8DE
oklch(88.6% 0.008 301.3)
-
Step 300
300
#C2BFCA
oklch(81% 0.016 298.5)
-
Step 400
400
#A29DAE
oklch(70.6% 0.025 299.2)
-
Step 500
500
#8C869B
oklch(63.2% 0.032 298.5)
-
Step 600
600
#766F85
oklch(55.6% 0.035 299.8)
-
Step 700
700 (this color)
#645E72
oklch(49.5% 0.032 298.9)
-
Step 800
800
#514C5C
oklch(42.7% 0.027 299.5)
-
Step 900
900
#433F4B
oklch(37.6% 0.021 300.6)
-
Step 950
950
#27252C
oklch(27% 0.013 298.6)
#645E72 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) | #5A6173 | 0.017 |
| Deuteranopia (no green cones) | #5B6171 | 0.016 |
| Tritanopia (no blue cones) | #626165 | 0.026 |
| Achromatopsia (no color) | #616161 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645E72
#645E72
oklch(49.5% 0.032 298.9)
- #606550
#606550
oklch(49.6% 0.033 118.5)
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 #645E72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.033
- Dusty Grape #545775 ΔE 0.036
- Dim Gray #696969 ΔE 0.041
- YInMn Blue #415A77 ΔE 0.054
- Dusk #4E5481 ΔE 0.057
- Dull Purple #84597E ΔE 0.060
- Muted Purple #805B87 ΔE 0.061
- Dusty Purple #825F87 ΔE 0.062
Use #645E72 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.