#644F7D
Closest named color: Dusk (#4E5481). oklch(46.8% 0.077 304.6), rgb(100, 79, 125).
Aa
White text reads best on this color (7.10:1).
About this color
#644F7D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.077 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.036 away. White text reads best on it, at 7.10:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.077) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #644F7D |
| RGB | rgb(100, 79, 125) |
| HSL | hsl(267, 23%, 40%) |
| OKLCH | oklch(46.8% 0.077 304.6) |
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 #644F7D | 7.10:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #644F7D | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #644F7D text on white | 7.10:1 | AAA | Lc 84.6 | Fine for body text |
| #644F7D text on black | 2.95:1 | Fails | Lc -17.4 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EBE8F0
oklch(93.6% 0.011 303.1)
-
Step 200
200
#DCD6E4
oklch(88.5% 0.02 305.2)
-
Step 300
300
#C6BBD4
oklch(80.9% 0.037 305.4)
-
Step 400
400
#A998BF
oklch(70.8% 0.059 304.7)
-
Step 500
500
#947EAF
oklch(63.1% 0.076 304.8)
-
Step 600
600
#7E679A
oklch(55.6% 0.081 304.6)
-
Step 700
700 (this color)
#644F7D
oklch(46.8% 0.077 304.6)
-
Step 800
800
#57466B
oklch(42.7% 0.063 304.9)
-
Step 900
900
#473B57
oklch(37.7% 0.049 303.8)
-
Step 950
950
#2A2333
oklch(27.1% 0.031 304.4)
#644F7D 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) | #45577F | 0.050 |
| Deuteranopia (no green cones) | #49587C | 0.047 |
| Tritanopia (no blue cones) | #605660 | 0.058 |
| Achromatopsia (no color) | #585858 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F7D
#644F7D
oklch(46.8% 0.077 304.6)
- #51622F
#51622F
oklch(46.9% 0.078 124.5)
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 #644F7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.036
- Dusty Grape #545775 ΔE 0.038
- Twilight #4E518B ΔE 0.041
- YInMn Blue #415A77 ΔE 0.061
- Muted Purple #805B87 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.062
- Dull Purple #84597E ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.068
Use #644F7D 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.