#645A71
Closest named color: Dusty Grape (#545775). oklch(48.6% 0.038 304.8), rgb(100, 90, 113).
Aa
White text reads best on this color (6.47:1).
About this color
#645A71 is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.038 and its hue 305°. 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 6.47:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.24:1 |
| White text | 6.47:1 |
Values
| HEX | #645A71 |
| RGB | rgb(100, 90, 113) |
| HSL | hsl(266, 11%, 40%) |
| OKLCH | oklch(48.6% 0.038 304.8) |
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 #645A71 | 6.47:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #645A71 | 3.24:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #645A71 text on white | 6.47:1 | AA | Lc 82.1 | Fine for body text |
| #645A71 text on black | 3.24:1 | AA large text | Lc -19.8 | 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
#DAD7DF
oklch(88.4% 0.011 303.1)
-
Step 300
300
#C3BECA
oklch(80.9% 0.017 304.7)
-
Step 400
400
#A59CB0
oklch(70.7% 0.03 305.9)
-
Step 500
500
#8E849C
oklch(63% 0.037 304.2)
-
Step 600
600
#796E87
oklch(55.7% 0.04 305.1)
-
Step 700
700 (this color)
#645A71
oklch(48.6% 0.038 304.8)
-
Step 800
800
#534B5D
oklch(42.8% 0.031 305.3)
-
Step 900
900
#443E4C
oklch(37.5% 0.025 304.7)
-
Step 950
950
#28252D
oklch(27.1% 0.015 302.4)
#645A71 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) | #565E72 | 0.023 |
| Deuteranopia (no green cones) | #585E70 | 0.022 |
| Tritanopia (no blue cones) | #625D62 | 0.029 |
| Achromatopsia (no color) | #5E5E5E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645A71
#645A71
oklch(48.6% 0.038 304.8)
- #5A634C
#5A634C
oklch(48.5% 0.037 125.1)
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 #645A71, 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 0.041
- Dusk #4E5481 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.052
- Dim Gray #696969 ΔE 0.052
- Dull Purple #84597E ΔE 0.060
- Muted Purple #805B87 ΔE 0.061
- Dusty Purple #825F87 ΔE 0.064
Use #645A71 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.