#644A83
Closest named color: Twilight (#4E518B). oklch(46.2% 0.094 304), rgb(100, 74, 131).
Aa
White text reads best on this color (7.37:1).
About this color
#644A83 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.094 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.039 away. White text reads best on it, at 7.37:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #644A83 |
| RGB | rgb(100, 74, 131) |
| HSL | hsl(267, 28%, 40%) |
| OKLCH | oklch(46.2% 0.094 304) |
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 #644A83 | 7.37:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #644A83 | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #644A83 text on white | 7.37:1 | AAA | Lc 85.5 | Fine for body text |
| #644A83 text on black | 2.84:1 | Fails | Lc -16.5 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F1
oklch(93.7% 0.013 306)
-
Step 200
200
#DCD5E7
oklch(88.4% 0.026 303.5)
-
Step 300
300
#C7BAD9
oklch(80.9% 0.045 304.4)
-
Step 400
400
#AA96C6
oklch(70.7% 0.072 303.6)
-
Step 500
500
#967BB8
oklch(63.1% 0.094 304.1)
-
Step 600
600
#8064A3
oklch(55.6% 0.1 303.8)
-
Step 700
700 (this color)
#644A83
oklch(46.2% 0.094 304)
-
Step 800
800
#584472
oklch(42.8% 0.078 303.3)
-
Step 900
900
#49395C
oklch(37.7% 0.061 304.6)
-
Step 950
950
#2A2236
oklch(27% 0.038 302.3)
#644A83 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) | #3C5585 | 0.065 |
| Deuteranopia (no green cones) | #425681 | 0.060 |
| Tritanopia (no blue cones) | #5F5360 | 0.071 |
| Achromatopsia (no color) | #565656 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A83
#644A83
oklch(46.2% 0.094 304)
- #4E611F
#4E611F
oklch(46.2% 0.094 123.8)
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 #644A83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.044
- Dusty Grape #545775 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.066
- Blueberry #464196 ΔE 0.068
- Light Eggplant #894585 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.068
- Rebecca Purple #663399 ΔE 0.069
Use #644A83 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.