#645B79
Closest named color: Dusty Grape (#545775). oklch(49.1% 0.048 298.4), rgb(100, 91, 121).
Aa
White text reads best on this color (6.33:1).
About this color
#645B79 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.048 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.029 away. White text reads best on it, at 6.33:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.048) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #645B79 |
| RGB | rgb(100, 91, 121) |
| HSL | hsl(258, 14%, 42%) |
| OKLCH | oklch(49.1% 0.048 298.4) |
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 #645B79 | 6.33:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #645B79 | 3.31:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #645B79 text on white | 6.33:1 | AA | Lc 81.5 | Fine for body text |
| #645B79 text on black | 3.31:1 | AA large text | Lc -20.4 | 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 700.
-
Step 50
50
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E1
oklch(88.4% 0.014 299.8)
-
Step 300
300
#C2BECE
oklch(81% 0.023 297.3)
-
Step 400
400
#A39CB5
oklch(70.7% 0.037 298.3)
-
Step 500
500
#8D84A3
oklch(63.2% 0.047 298.3)
-
Step 600
600
#776D8E
oklch(55.6% 0.052 298.6)
-
Step 700
700 (this color)
#645B79
oklch(49.1% 0.048 298.4)
-
Step 800
800
#524A62
oklch(42.6% 0.04 300)
-
Step 900
900
#433E50
oklch(37.6% 0.031 297.6)
-
Step 950
950
#27242F
oklch(26.8% 0.021 297.5)
#645B79 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) | #55607A | 0.025 |
| Deuteranopia (no green cones) | #565F78 | 0.024 |
| Tritanopia (no blue cones) | #605F65 | 0.039 |
| Achromatopsia (no color) | #606060 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B79
#645B79
oklch(49.1% 0.048 298.4)
- #5E6545
#5E6545
oklch(49.2% 0.049 118.3)
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 #645B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.029
- Slate #516572 ΔE 0.044
- Dusk #4E5481 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.052
- Muted Purple #805B87 ΔE 0.053
- Dull Purple #84597E ΔE 0.056
- Dusky Blue #475F94 ΔE 0.057
- Dim Gray #696969 ΔE 0.057
Use #645B79 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.