#644780
Closest named color: Twilight (#4E518B). oklch(45.4% 0.096 306.4), rgb(100, 71, 128).
Aa
White text reads best on this color (7.62:1).
About this color
#644780 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.096 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.044 away. White text reads best on it, at 7.62:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #644780 |
| RGB | rgb(100, 71, 128) |
| HSL | hsl(271, 29%, 39%) |
| OKLCH | oklch(45.4% 0.096 306.4) |
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 #644780 | 7.62:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #644780 | 2.75:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #644780 text on white | 7.62:1 | AAA | Lc 86.4 | Fine for body text |
| #644780 text on black | 2.75:1 | Fails | Lc -15.7 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DED4EA
oklch(88.5% 0.032 306.2)
-
Step 300
300
#CAB8DE
oklch(81% 0.056 306.6)
-
Step 400
400
#AF92CD
oklch(70.7% 0.09 306.7)
-
Step 500
500
#9B76C0
oklch(63.1% 0.115 306.4)
-
Step 600
600
#865EAC
oklch(55.6% 0.124 306.4)
-
Step 700
700
#714D94
oklch(49.1% 0.116 306)
-
Step 800
800 (this color)
#644780
oklch(45.4% 0.096 306.4)
-
Step 900
900
#4C3661
oklch(37.7% 0.076 306.7)
-
Step 950
950
#2C2039
oklch(27% 0.048 305.5)
#644780 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) | #395382 | 0.070 |
| Deuteranopia (no green cones) | #40547E | 0.064 |
| Tritanopia (no blue cones) | #60505D | 0.070 |
| Achromatopsia (no color) | #545454 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644780
#644780
oklch(45.4% 0.096 306.4)
- #49601E
#49601E
oklch(45.5% 0.096 126.4)
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 #644780, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.044
- Dusk #4E5481 ΔE 0.048
- Dusty Grape #545775 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.063
- Rebecca Purple #663399 ΔE 0.067
- Blueberry #464196 ΔE 0.068
- Light Eggplant #894585 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.076
Use #644780 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.