#645C71
Closest named color: Dusty Grape (#545775). oklch(49% 0.034 302.5), rgb(100, 92, 113).
Aa
White text reads best on this color (6.34:1).
About this color
#645C71 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.034 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.032 away. White text reads best on it, at 6.34:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #645C71 |
| RGB | rgb(100, 92, 113) |
| HSL | hsl(263, 10%, 40%) |
| OKLCH | oklch(49% 0.034 302.5) |
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 #645C71 | 6.34:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #645C71 | 3.31:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #645C71 text on white | 6.34:1 | AA | Lc 81.6 | Fine for body text |
| #645C71 text on black | 3.31:1 | AA large text | Lc -20.3 | 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
#EAE9EC
oklch(93.6% 0.004 301.4)
-
Step 200
200
#DAD8DE
oklch(88.6% 0.008 301.3)
-
Step 300
300
#C2BECA
oklch(80.8% 0.017 301.2)
-
Step 400
400
#A49DAF
oklch(70.8% 0.027 303.3)
-
Step 500
500
#8D859B
oklch(63.1% 0.034 302)
-
Step 600
600
#776E86
oklch(55.5% 0.038 302.2)
-
Step 700
700 (this color)
#645C71
oklch(49% 0.034 302.5)
-
Step 800
800
#524B5C
oklch(42.6% 0.029 303.9)
-
Step 900
900
#443F4C
oklch(37.8% 0.023 302.8)
-
Step 950
950
#28252C
oklch(27.1% 0.013 304.9)
#645C71 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) | #585F72 | 0.019 |
| Deuteranopia (no green cones) | #5A5F70 | 0.018 |
| Tritanopia (no blue cones) | #625F63 | 0.027 |
| Achromatopsia (no color) | #5F5F5F | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645C71
#645C71
oklch(49% 0.034 302.5)
- #5D644E
#5D644E
oklch(49.1% 0.035 122)
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 #645C71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.032
- Slate #516572 ΔE 0.036
- Dim Gray #696969 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.053
- Dusk #4E5481 ΔE 0.054
- Dull Purple #84597E ΔE 0.060
- Muted Purple #805B87 ΔE 0.061
- Dusty Purple #825F87 ΔE 0.063
Use #645C71 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.