#645689
Closest named color: Dusk (#4E5481). oklch(48.8% 0.081 295.9), rgb(100, 86, 137).
Aa
White text reads best on this color (6.49:1).
About this color
#645689 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.081 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.038 away. White text reads best on it, at 6.49:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #645689 |
| RGB | rgb(100, 86, 137) |
| HSL | hsl(256, 23%, 44%) |
| OKLCH | oklch(48.8% 0.081 295.9) |
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 #645689 | 6.49:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #645689 | 3.23:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #645689 text on white | 6.49:1 | AA | Lc 82.1 | Fine for body text |
| #645689 text on black | 3.23:1 | AA large text | Lc -19.7 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#DAD6E6
oklch(88.4% 0.022 297.4)
-
Step 300
300
#C2BCD8
oklch(80.9% 0.04 295.3)
-
Step 400
400
#A399C4
oklch(70.6% 0.063 295.4)
-
Step 500
500
#8D80B5
oklch(63.1% 0.08 295.3)
-
Step 600
600
#7868A1
oklch(55.6% 0.088 296.3)
-
Step 700
700 (this color)
#645689
oklch(48.8% 0.081 295.9)
-
Step 800
800
#524770
oklch(42.7% 0.068 295.7)
-
Step 900
900
#443C5B
oklch(37.8% 0.053 295.6)
-
Step 950
950
#282335
oklch(27% 0.034 296.8)
#645689 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) | #495E8B | 0.043 |
| Deuteranopia (no green cones) | #4B5D88 | 0.041 |
| Tritanopia (no blue cones) | #5C5F69 | 0.067 |
| Achromatopsia (no color) | #5E5E5E | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645689
#645689
oklch(48.8% 0.081 295.9)
- #5E662C
#5E662C
oklch(49% 0.082 116)
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 #645689, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.038
- Twilight #4E518B ΔE 0.040
- Dusty Grape #545775 ΔE 0.043
- Dusky Blue #475F94 ΔE 0.047
- Muted Purple #805B87 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.058
- Dusty Purple #825F87 ΔE 0.060
- Dull Purple #84597E ΔE 0.060
Use #645689 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.