#644B77
Closest named color: Dusk (#4E5481). oklch(45.7% 0.076 309.7), rgb(100, 75, 119).
Aa
White text reads best on this color (7.46:1).
About this color
#644B77 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.076 and its hue 310°. 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 (0.076) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #644B77 |
| RGB | rgb(100, 75, 119) |
| HSL | hsl(274, 23%, 38%) |
| OKLCH | oklch(45.7% 0.076 309.7) |
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 #644B77 | 7.46:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #644B77 | 2.81:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #644B77 text on white | 7.46:1 | AAA | Lc 85.9 | Fine for body text |
| #644B77 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DED5E6
oklch(88.5% 0.025 309.3)
-
Step 300
300
#C9B9D7
oklch(80.9% 0.045 309.2)
-
Step 400
400
#AE95C2
oklch(70.7% 0.07 309.8)
-
Step 500
500
#9A7AB3
oklch(63.1% 0.091 309.6)
-
Step 600
600
#85629F
oklch(55.6% 0.1 309.8)
-
Step 700
700
#705188
oklch(49% 0.092 309.2)
-
Step 800
800 (this color)
#644B77
oklch(45.7% 0.076 309.7)
-
Step 900
900
#4B3959
oklch(37.8% 0.058 309.5)
-
Step 950
950
#2C2134
oklch(26.9% 0.038 310.4)
#644B77 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) | #435479 | 0.055 |
| Deuteranopia (no green cones) | #485576 | 0.051 |
| Tritanopia (no blue cones) | #62515B | 0.055 |
| Achromatopsia (no color) | #555555 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B77
#644B77
oklch(45.7% 0.076 309.7)
- #496031
#496031
oklch(45.8% 0.076 130.3)
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 #644B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.042
- Dusty Grape #545775 ΔE 0.042
- Twilight #4E518B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.065
- Brownish Purple #76424E ΔE 0.071
- Muted Purple #805B87 ΔE 0.071
- Dull Purple #84597E ΔE 0.072
- Dusky Blue #475F94 ΔE 0.073
Use #644B77 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.