#644A7E
Closest named color: Twilight (#4E518B). oklch(45.9% 0.087 306.3), rgb(100, 74, 126).
Aa
White text reads best on this color (7.43:1).
About this color
#644A7E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.087 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.042 away. White text reads best on it, at 7.43:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #644A7E |
| RGB | rgb(100, 74, 126) |
| HSL | hsl(270, 26%, 39%) |
| OKLCH | oklch(45.9% 0.087 306.3) |
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 #644A7E | 7.43:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #644A7E | 2.82:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #644A7E text on white | 7.43:1 | AAA | Lc 85.8 | Fine for body text |
| #644A7E text on black | 2.82:1 | Fails | Lc -16.3 | 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
#ECE7F2
oklch(93.5% 0.016 306.4)
-
Step 200
200
#DED5E8
oklch(88.6% 0.027 307)
-
Step 300
300
#C9B9DB
oklch(81% 0.05 306.5)
-
Step 400
400
#AD94C9
oklch(70.7% 0.081 305.9)
-
Step 500
500
#9978BB
oklch(63% 0.104 306.2)
-
Step 600
600
#8460A7
oklch(55.5% 0.113 306.4)
-
Step 700
700
#704F90
oklch(49.1% 0.107 306.3)
-
Step 800
800 (this color)
#644A7E
oklch(45.9% 0.087 306.3)
-
Step 900
900
#4B385E
oklch(37.8% 0.067 306.4)
-
Step 950
950
#2C2137
oklch(27.1% 0.042 306.7)
#644A7E 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) | #3E5480 | 0.062 |
| Deuteranopia (no green cones) | #44557D | 0.057 |
| Tritanopia (no blue cones) | #60525E | 0.064 |
| Achromatopsia (no color) | #555555 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A7E
#644A7E
oklch(45.9% 0.087 306.3)
- #4B6026
#4B6026
oklch(45.8% 0.087 126.3)
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 #644A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.042
- Dusk #4E5481 ΔE 0.042
- Dusty Grape #545775 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.069
- Light Eggplant #894585 ΔE 0.069
- YInMn Blue #415A77 ΔE 0.070
- Dusky Blue #475F94 ΔE 0.071
- Muted Purple #805B87 ΔE 0.071
Use #644A7E 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.