#645D74
Closest named color: Dusty Grape (#545775). oklch(49.3% 0.037 299), rgb(100, 93, 116).
Aa
White text reads best on this color (6.25:1).
About this color
#645D74 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.037 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.033 away. White text reads best on it, at 6.25:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.037) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #645D74 |
| RGB | rgb(100, 93, 116) |
| HSL | hsl(258, 11%, 41%) |
| OKLCH | oklch(49.3% 0.037 299) |
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 #645D74 | 6.25:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #645D74 | 3.35:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #645D74 text on white | 6.25:1 | AA | Lc 81.2 | Fine for body text |
| #645D74 text on black | 3.35:1 | AA large text | Lc -20.7 | 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 700.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
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
#C2BECB
oklch(80.9% 0.019 300)
-
Step 400
400
#A39DB0
oklch(70.7% 0.028 300.1)
-
Step 500
500
#8C859D
oklch(63.1% 0.036 298.7)
-
Step 600
600
#766E88
oklch(55.5% 0.041 299.1)
-
Step 700
700 (this color)
#645D74
oklch(49.3% 0.037 299)
-
Step 800
800
#514B5E
oklch(42.6% 0.032 299.5)
-
Step 900
900
#433F4D
oklch(37.7% 0.024 298.3)
-
Step 950
950
#27252D
oklch(27% 0.015 296.8)
#645D74 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) | #596075 | 0.018 |
| Deuteranopia (no green cones) | #5A6073 | 0.017 |
| Tritanopia (no blue cones) | #616065 | 0.029 |
| Achromatopsia (no color) | #606060 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645D74
#645D74
oklch(49.3% 0.037 299)
- #5F654D
#5F654D
oklch(49.5% 0.037 119.2)
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 #645D74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.033
- Slate #516572 ΔE 0.036
- Dim Gray #696969 ΔE 0.046
- Dusk #4E5481 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.053
- Muted Purple #805B87 ΔE 0.058
- Dull Purple #84597E ΔE 0.058
- Dusty Purple #825F87 ΔE 0.060
Use #645D74 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.