#644381
Closest named color: Twilight (#4E518B). oklch(44.7% 0.104 307.2), rgb(100, 67, 129).
Aa
White text reads best on this color (7.88:1).
About this color
#644381 is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.104 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.050 away. White text reads best on it, at 7.88:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #644381 |
| RGB | rgb(100, 67, 129) |
| HSL | hsl(272, 32%, 38%) |
| OKLCH | oklch(44.7% 0.104 307.2) |
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 #644381 | 7.88:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644381 | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #644381 text on white | 7.88:1 | AAA | Lc 87.2 | Fine for body text |
| #644381 text on black | 2.66:1 | Fails | Lc -14.9 | Not readable |
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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EB
oklch(88.6% 0.033 307.1)
-
Step 300
300
#CBB7E0
oklch(81% 0.061 307.1)
-
Step 400
400
#B190D0
oklch(70.7% 0.098 307.6)
-
Step 500
500
#9E74C4
oklch(63.2% 0.124 307.4)
-
Step 600
600
#885BB0
oklch(55.6% 0.135 307)
-
Step 700
700
#744A97
oklch(49.1% 0.126 307.6)
-
Step 800
800 (this color)
#644381
oklch(44.7% 0.104 307.2)
-
Step 900
900
#4D3563
oklch(37.7% 0.081 307)
-
Step 950
950
#2D1F3A
oklch(27% 0.052 307.1)
#644381 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) | #335083 | 0.079 |
| Deuteranopia (no green cones) | #3C527F | 0.072 |
| Tritanopia (no blue cones) | #604D5C | 0.075 |
| Achromatopsia (no color) | #515151 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644381
#644381
oklch(44.7% 0.104 307.2)
- #455F14
#455F14
oklch(44.9% 0.104 127.2)
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 #644381, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.056
- Rebecca Purple #663399 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.064
- Dusty Grape #545775 ΔE 0.067
- Light Eggplant #894585 ΔE 0.071
- Dusky Blue #475F94 ΔE 0.084
Use #644381 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.