#644B95
Closest named color: Twilight (#4E518B). oklch(47.4% 0.118 297.3), rgb(100, 75, 149).
Aa
White text reads best on this color (7.04:1).
About this color
#644B95 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.118 and its hue 297°. 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 7.04:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.98:1 |
| White text | 7.04:1 |
Values
| HEX | #644B95 |
| RGB | rgb(100, 75, 149) |
| HSL | hsl(260, 33%, 44%) |
| OKLCH | oklch(47.4% 0.118 297.3) |
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 #644B95 | 7.04:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #644B95 | 2.98:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #644B95 text on white | 7.04:1 | AAA | Lc 84.2 | Fine for body text |
| #644B95 text on black | 2.98:1 | Fails | Lc -17.8 | 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
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4B9E1
oklch(80.8% 0.057 297.7)
-
Step 400
400
#A795D3
oklch(70.8% 0.091 297.4)
-
Step 500
500
#9179C7
oklch(63% 0.117 297.1)
-
Step 600
600
#7C61B3
oklch(55.6% 0.126 297.3)
-
Step 700
700 (this color)
#644B95
oklch(47.4% 0.118 297.3)
-
Step 800
800
#55427D
oklch(42.7% 0.097 297)
-
Step 900
900
#463865
oklch(37.7% 0.076 296.9)
-
Step 950
950
#29213B
oklch(27% 0.048 297.2)
#644B95 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) | #325998 | 0.075 |
| Deuteranopia (no green cones) | #375893 | 0.070 |
| Tritanopia (no blue cones) | #595969 | 0.093 |
| Achromatopsia (no color) | #595959 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B95
#644B95
oklch(47.4% 0.118 297.3)
- #586300
#586300
oklch(47.4% 0.109 117)
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 #644B95, 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 0.056
- Rebecca Purple #663399 ΔE 0.056
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Dusky Blue #475F94 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.070
- Light Eggplant #894585 ΔE 0.072
Use #644B95 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.