#645D89
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.069 291), rgb(100, 93, 137).
Aa
White text reads best on this color (6.05:1).
About this color
#645D89 is a medium-dark, muted purple. In OKLCH its lightness is 50%, its chroma 0.069 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.043 away. White text reads best on it, at 6.05:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.069) |
| Temperature | in between |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.46:1 |
| White text | 6.05:1 |
Values
| HEX | #645D89 |
| RGB | rgb(100, 93, 137) |
| HSL | hsl(250, 19%, 45%) |
| OKLCH | oklch(50.3% 0.069 291) |
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 #645D89 | 6.05:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #645D89 | 3.46:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #645D89 text on white | 6.05:1 | AA | Lc 80.2 | Fine for body text |
| #645D89 text on black | 3.46:1 | AA large text | Lc -21.6 | 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
#D9D7E5
oklch(88.5% 0.019 292.6)
-
Step 300
300
#C0BDD5
oklch(80.8% 0.034 291.4)
-
Step 400
400
#A09BC0
oklch(70.6% 0.054 291.2)
-
Step 500
500
#8982B0
oklch(63% 0.069 291.3)
-
Step 600
600
#736C9C
oklch(55.7% 0.074 290.5)
-
Step 700
700 (this color)
#645D89
oklch(50.3% 0.069 291)
-
Step 800
800
#4F496C
oklch(42.6% 0.058 291.6)
-
Step 900
900
#413D58
oklch(37.6% 0.046 290.8)
-
Step 950
950
#262433
oklch(26.9% 0.028 290.5)
#645D89 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) | #52638B | 0.029 |
| Deuteranopia (no green cones) | #526288 | 0.029 |
| Tritanopia (no blue cones) | #5C656D | 0.059 |
| Achromatopsia (no color) | #626262 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645D89
#645D89
oklch(50.3% 0.069 291)
- #666837
#666837
oklch(50.4% 0.07 110.7)
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 #645D89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.043
- Dusty Grape #545775 ΔE 0.044
- Dusk #4E5481 ΔE 0.046
- Muted Purple #805B87 ΔE 0.046
- Dusty Purple #825F87 ΔE 0.051
- Twilight #4E518B ΔE 0.052
- Denim #3B638C ΔE 0.055
- Dull Purple #84597E ΔE 0.055
Use #645D89 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.