#644291
Closest named color: Rebecca Purple (#663399). oklch(45.6% 0.127 301.4), rgb(100, 66, 145).
Aa
White text reads best on this color (7.69:1).
About this color
#644291 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.127 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.037 away. White text reads best on it, at 7.69:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.73:1 |
| White text | 7.69:1 |
Values
| HEX | #644291 |
| RGB | rgb(100, 66, 145) |
| HSL | hsl(266, 37%, 41%) |
| OKLCH | oklch(45.6% 0.127 301.4) |
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 #644291 | 7.69:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #644291 | 2.73:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #644291 text on white | 7.69:1 | AAA | Lc 86.5 | Fine for body text |
| #644291 text on black | 2.73:1 | Fails | Lc -15.6 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DED3F1
oklch(88.5% 0.042 302.2)
-
Step 300
300
#C9B6E9
oklch(80.9% 0.074 301.8)
-
Step 400
400
#AE8EDF
oklch(70.7% 0.12 301.6)
-
Step 500
500
#9A70D5
oklch(63% 0.151 301.4)
-
Step 600
600
#8556C3
oklch(55.6% 0.165 301.1)
-
Step 700
700
#7146A8
oklch(49.2% 0.153 301.2)
-
Step 800
800 (this color)
#644291
oklch(45.6% 0.127 301.4)
-
Step 900
900
#4B336D
oklch(37.8% 0.098 300.9)
-
Step 950
950
#2C1E40
oklch(27% 0.063 301.3)
#644291 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) | #255394 | 0.092 |
| Deuteranopia (no green cones) | #30538F | 0.084 |
| Tritanopia (no blue cones) | #5B5163 | 0.096 |
| Achromatopsia (no color) | #535353 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644291
#644291
oklch(45.6% 0.127 301.4)
- #4E5F00
#4E5F00
oklch(45.5% 0.109 121)
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 #644291, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.037
- Twilight #4E518B ΔE 0.053
- Blueberry #464196 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.053
- Dusk #4E5481 ΔE 0.067
- Light Eggplant #894585 ΔE 0.075
- Dusty Grape #545775 ΔE 0.084
- Dusky Blue #475F94 ΔE 0.084
Use #644291 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.