#645690
Closest named color: Twilight (#4E518B). oklch(49.2% 0.092 293.9), rgb(100, 86, 144).
Aa
White text reads best on this color (6.41:1).
About this color
#645690 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.092 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.040 away. White text reads best on it, at 6.41:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #645690 |
| RGB | rgb(100, 86, 144) |
| HSL | hsl(254, 25%, 45%) |
| OKLCH | oklch(49.2% 0.092 293.9) |
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 #645690 | 6.41:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #645690 | 3.27:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #645690 text on white | 6.41:1 | AA | Lc 81.8 | Fine for body text |
| #645690 text on black | 3.27:1 | AA large text | Lc -20.1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#D9D6E8
oklch(88.4% 0.025 293.5)
-
Step 300
300
#C1BCDB
oklch(80.9% 0.044 292.8)
-
Step 400
400
#A298C9
oklch(70.6% 0.071 293.8)
-
Step 500
500
#8C7FBB
oklch(63.1% 0.09 293.6)
-
Step 600
600
#7767A7
oklch(55.6% 0.099 294.5)
-
Step 700
700 (this color)
#645690
oklch(49.2% 0.092 293.9)
-
Step 800
800
#514675
oklch(42.6% 0.077 293.6)
-
Step 900
900
#433B5E
oklch(37.6% 0.06 293.8)
-
Step 950
950
#272337
oklch(27% 0.037 292.9)
#645690 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) | #455F92 | 0.048 |
| Deuteranopia (no green cones) | #475E8F | 0.046 |
| Tritanopia (no blue cones) | #5A606C | 0.075 |
| Achromatopsia (no color) | #5F5F5F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645690
#645690
oklch(49.2% 0.092 293.9)
- #616721
#616721
oklch(49.4% 0.093 114)
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 #645690, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.040
- Dusk #4E5481 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.046
- Dusty Grape #545775 ΔE 0.053
- Muted Purple #805B87 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.057
- Dusty Purple #825F87 ΔE 0.062
- Dull Purple #84597E ΔE 0.064
Use #645690 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.