#645583
Closest named color: Dusk (#4E5481). oklch(48.3% 0.074 298.6), rgb(100, 85, 131).
Aa
White text reads best on this color (6.62:1).
About this color
#645583 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.074 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.036 away. White text reads best on it, at 6.62:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.074) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.16:1 |
| White text | 6.62:1 |
Values
| HEX | #645583 |
| RGB | rgb(100, 85, 131) |
| HSL | hsl(260, 21%, 42%) |
| OKLCH | oklch(48.3% 0.074 298.6) |
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 #645583 | 6.62:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #645583 | 3.16:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #645583 text on white | 6.62:1 | AA | Lc 82.7 | Fine for body text |
| #645583 text on black | 3.16:1 | AA large text | Lc -19.2 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EAE8F0
oklch(93.5% 0.011 297.6)
-
Step 200
200
#DAD6E5
oklch(88.4% 0.021 298.2)
-
Step 300
300
#C3BCD5
oklch(80.9% 0.036 298.4)
-
Step 400
400
#A599C0
oklch(70.7% 0.058 299)
-
Step 500
500
#8F80B0
oklch(63.1% 0.073 298.6)
-
Step 600
600
#79699C
oklch(55.6% 0.08 298.2)
-
Step 700
700 (this color)
#645583
oklch(48.3% 0.074 298.6)
-
Step 800
800
#53476C
oklch(42.6% 0.062 298.7)
-
Step 900
900
#453C58
oklch(37.7% 0.048 298.8)
-
Step 950
950
#282333
oklch(26.9% 0.03 298.7)
#645583 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) | #4A5D85 | 0.042 |
| Deuteranopia (no green cones) | #4D5C82 | 0.039 |
| Tritanopia (no blue cones) | #5E5C66 | 0.058 |
| Achromatopsia (no color) | #5D5D5D | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645583
#645583
oklch(48.3% 0.074 298.6)
- #5A6432
#5A6432
oklch(48.2% 0.073 118.5)
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 #645583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.036
- Dusty Grape #545775 ΔE 0.036
- Twilight #4E518B ΔE 0.041
- Dusky Blue #475F94 ΔE 0.051
- Muted Purple #805B87 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.058
- Dull Purple #84597E ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
Use #645583 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.