#644A7C
Closest named color: Dusk (#4E5481). oklch(45.8% 0.084 307.3), rgb(100, 74, 124).
Aa
White text reads best on this color (7.46:1).
About this color
#644A7C is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.084 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.042 away. White text reads best on it, at 7.46:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #644A7C |
| RGB | rgb(100, 74, 124) |
| HSL | hsl(271, 25%, 39%) |
| OKLCH | oklch(45.8% 0.084 307.3) |
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 #644A7C | 7.46:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #644A7C | 2.81:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #644A7C text on white | 7.46:1 | AAA | Lc 85.9 | Fine for body text |
| #644A7C text on black | 2.81:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE7F1
oklch(93.5% 0.014 308.3)
-
Step 200
200
#DED5E8
oklch(88.6% 0.027 307)
-
Step 300
300
#C9B9DA
oklch(81% 0.049 307.1)
-
Step 400
400
#AE94C7
oklch(70.8% 0.078 307.7)
-
Step 500
500
#9A79B9
oklch(63.2% 0.1 307.4)
-
Step 600
600
#8461A5
oklch(55.6% 0.109 306.9)
-
Step 700
700
#70508D
oklch(49.1% 0.101 307.2)
-
Step 800
800 (this color)
#644A7C
oklch(45.8% 0.084 307.3)
-
Step 900
900
#4B385D
oklch(37.8% 0.066 307.1)
-
Step 950
950
#2C2136
oklch(27% 0.041 307.8)
#644A7C 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) | #3F547E | 0.061 |
| Deuteranopia (no green cones) | #45557B | 0.056 |
| Tritanopia (no blue cones) | #61525D | 0.063 |
| Achromatopsia (no color) | #555555 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A7C
#644A7C
oklch(45.8% 0.084 307.3)
- #4A6029
#4A6029
oklch(45.8% 0.085 127.5)
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 #644A7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.042
- Twilight #4E518B ΔE 0.043
- Dusty Grape #545775 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.069
- Light Eggplant #894585 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.070
- Muted Purple #805B87 ΔE 0.071
- Dusky Blue #475F94 ΔE 0.072
Use #644A7C 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.