#645189
Closest named color: Twilight (#4E518B). oklch(47.8% 0.09 298.6), rgb(100, 81, 137).
Aa
White text reads best on this color (6.81:1).
About this color
#645189 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.090 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 6.81:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #645189 |
| RGB | rgb(100, 81, 137) |
| HSL | hsl(260, 26%, 43%) |
| OKLCH | oklch(47.8% 0.09 298.6) |
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 #645189 | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #645189 | 3.08:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #645189 text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #645189 text on black | 3.08:1 | AA large text | Lc -18.5 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DBD6E7
oklch(88.5% 0.024 299.3)
-
Step 300
300
#C4BBDA
oklch(80.9% 0.044 298.7)
-
Step 400
400
#A697C7
oklch(70.6% 0.071 298.9)
-
Step 500
500
#907DB8
oklch(63% 0.089 298.6)
-
Step 600
600
#7B66A4
oklch(55.6% 0.097 298.8)
-
Step 700
700 (this color)
#645189
oklch(47.8% 0.09 298.6)
-
Step 800
800
#544572
oklch(42.6% 0.075 298.5)
-
Step 900
900
#463B5C
oklch(37.8% 0.057 299)
-
Step 950
950
#292236
oklch(26.9% 0.038 300)
#645189 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) | #425B8B | 0.054 |
| Deuteranopia (no green cones) | #465A88 | 0.050 |
| Tritanopia (no blue cones) | #5D5B66 | 0.073 |
| Achromatopsia (no color) | #5B5B5B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645189
#645189
oklch(47.8% 0.09 298.6)
- #586423
#586423
oklch(47.8% 0.09 118.8)
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 #645189, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusk #4E5481 ΔE 0.039
- Dusty Grape #545775 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.054
- Muted Purple #805B87 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
- Dull Purple #84597E ΔE 0.067
- YInMn Blue #415A77 ΔE 0.068
Use #645189 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.