#645989
Closest named color: Dusk (#4E5481). oklch(49.5% 0.076 294), rgb(100, 89, 137).
Aa
White text reads best on this color (6.30:1).
About this color
#645989 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.076 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.040 away. White text reads best on it, at 6.30:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #645989 |
| RGB | rgb(100, 89, 137) |
| HSL | hsl(254, 21%, 44%) |
| OKLCH | oklch(49.5% 0.076 294) |
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 #645989 | 6.30:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #645989 | 3.33:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #645989 text on white | 6.30:1 | AA | Lc 81.3 | Fine for body text |
| #645989 text on black | 3.33:1 | AA large text | Lc -20.5 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#EAE9F0
oklch(93.7% 0.009 292.8)
-
Step 200
200
#D9D7E6
oklch(88.5% 0.021 292.1)
-
Step 300
300
#C1BDD7
oklch(81% 0.036 292.6)
-
Step 400
400
#A29AC2
oklch(70.7% 0.058 294)
-
Step 500
500
#8C81B3
oklch(63.2% 0.075 294.2)
-
Step 600
600
#766A9F
oklch(55.7% 0.082 294)
-
Step 700
700 (this color)
#645989
oklch(49.5% 0.076 294)
-
Step 800
800
#51486E
oklch(42.7% 0.063 294.5)
-
Step 900
900
#433C59
oklch(37.6% 0.05 295)
-
Step 950
950
#272434
oklch(27.1% 0.03 292.9)
#645989 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) | #4D608B | 0.037 |
| Deuteranopia (no green cones) | #4E5F88 | 0.036 |
| Tritanopia (no blue cones) | #5C616B | 0.062 |
| Achromatopsia (no color) | #606060 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645989
#645989
oklch(49.5% 0.076 294)
- #616731
#616731
oklch(49.6% 0.077 114.5)
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 #645989, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.040
- Dusty Grape #545775 ΔE 0.042
- Twilight #4E518B ΔE 0.044
- Dusky Blue #475F94 ΔE 0.044
- Muted Purple #805B87 ΔE 0.049
- Dusty Purple #825F87 ΔE 0.055
- Dull Purple #84597E ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.058
Use #645989 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.