#644D87
Closest named color: Twilight (#4E518B). oklch(47% 0.094 301.1), rgb(100, 77, 135).
Aa
White text reads best on this color (7.11:1).
About this color
#644D87 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.094 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.036 away. White text reads best on it, at 7.11:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.95:1 |
| White text | 7.11:1 |
Values
| HEX | #644D87 |
| RGB | rgb(100, 77, 135) |
| HSL | hsl(264, 27%, 42%) |
| OKLCH | oklch(47% 0.094 301.1) |
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 #644D87 | 7.11:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #644D87 | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #644D87 text on white | 7.11:1 | AAA | Lc 84.6 | Fine for body text |
| #644D87 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DCD6E8
oklch(88.6% 0.025 301)
-
Step 300
300
#C5BADA
oklch(80.8% 0.046 301)
-
Step 400
400
#A896C7
oklch(70.6% 0.073 301.4)
-
Step 500
500
#937CB9
oklch(63.1% 0.093 301.1)
-
Step 600
600
#7E64A5
oklch(55.6% 0.102 301.6)
-
Step 700
700 (this color)
#644D87
oklch(47% 0.094 301.1)
-
Step 800
800
#564473
oklch(42.6% 0.079 300.8)
-
Step 900
900
#473A5D
oklch(37.8% 0.06 300.6)
-
Step 950
950
#2A2236
oklch(27% 0.038 302.3)
#644D87 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) | #3E5889 | 0.061 |
| Deuteranopia (no green cones) | #435885 | 0.057 |
| Tritanopia (no blue cones) | #5E5763 | 0.074 |
| Achromatopsia (no color) | #585858 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644D87
#644D87
oklch(47% 0.094 301.1)
- #53621E
#53621E
oklch(46.9% 0.094 120.8)
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 #644D87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.036
- Dusk #4E5481 ΔE 0.041
- Dusty Grape #545775 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.062
- Muted Purple #805B87 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.066
- Light Eggplant #894585 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.069
Use #644D87 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.