#644F96
Closest named color: Twilight (#4E518B). oklch(48.2% 0.112 295.5), rgb(100, 79, 150).
Aa
White text reads best on this color (6.77:1).
About this color
#644F96 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.112 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.040 away. White text reads best on it, at 6.77:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.10:1 |
| White text | 6.77:1 |
Values
| HEX | #644F96 |
| RGB | rgb(100, 79, 150) |
| HSL | hsl(258, 31%, 45%) |
| OKLCH | oklch(48.2% 0.112 295.5) |
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 #644F96 | 6.77:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #644F96 | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #644F96 text on white | 6.77:1 | AA | Lc 83.2 | Fine for body text |
| #644F96 text on black | 3.10:1 | AA large text | Lc -18.7 | 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 700.
-
Step 50
50
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#DAD6EB
oklch(88.6% 0.029 294.5)
-
Step 300
300
#C3BAE1
oklch(80.9% 0.055 295.7)
-
Step 400
400
#A596D1
oklch(70.8% 0.086 295.8)
-
Step 500
500
#8F7BC5
oklch(63.1% 0.111 295.5)
-
Step 600
600
#7A63B2
oklch(55.7% 0.121 295.6)
-
Step 700
700 (this color)
#644F96
oklch(48.2% 0.112 295.5)
-
Step 800
800
#54437C
oklch(42.7% 0.093 296)
-
Step 900
900
#453964
oklch(37.7% 0.073 295.5)
-
Step 950
950
#28223A
oklch(27.1% 0.044 294.7)
#644F96 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) | #385C99 | 0.067 |
| Deuteranopia (no green cones) | #3C5A94 | 0.062 |
| Tritanopia (no blue cones) | #595C6B | 0.090 |
| Achromatopsia (no color) | #5B5B5B | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F96
#644F96
oklch(48.2% 0.112 295.5)
- #5C6500
#5C6500
oklch(48.2% 0.11 115.7)
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 #644F96, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.040
- Dusk #4E5481 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.065
- Blueberry #464196 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.066
- Dusty Grape #545775 ΔE 0.069
- Muted Purple #805B87 ΔE 0.069
Use #644F96 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.