#644799
Closest named color: Rebecca Purple (#663399). oklch(46.9% 0.13 297.5), rgb(100, 71, 153).
Aa
White text reads best on this color (7.23:1).
About this color
#644799 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.130 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.045 away. White text reads best on it, at 7.23:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #644799 |
| RGB | rgb(100, 71, 153) |
| HSL | hsl(261, 37%, 44%) |
| OKLCH | oklch(46.9% 0.13 297.5) |
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 #644799 | 7.23:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #644799 | 2.90:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #644799 text on white | 7.23:1 | AAA | Lc 84.9 | Fine for body text |
| #644799 text on black | 2.90:1 | Fails | Lc -17.1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE8F5
oklch(93.7% 0.018 296.6)
-
Step 200
200
#DBD5EE
oklch(88.5% 0.035 296.7)
-
Step 300
300
#C5B9E5
oklch(81% 0.063 297.5)
-
Step 400
400
#A893D7
oklch(70.7% 0.1 298)
-
Step 500
500
#9377CD
oklch(63.1% 0.129 297.6)
-
Step 600
600
#7E5EBA
oklch(55.6% 0.14 297.7)
-
Step 700
700 (this color)
#644799
oklch(46.9% 0.13 297.5)
-
Step 800
800
#564082
oklch(42.7% 0.107 297)
-
Step 900
900
#473768
oklch(37.8% 0.083 297.3)
-
Step 950
950
#29203D
oklch(26.9% 0.054 296.9)
#644799 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) | #27579C | 0.086 |
| Deuteranopia (no green cones) | #2F5697 | 0.080 |
| Tritanopia (no blue cones) | #585769 | 0.101 |
| Achromatopsia (no color) | #575757 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644799
#644799
oklch(46.9% 0.13 297.5)
- #566200
#566200
oklch(46.9% 0.109 117.7)
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 #644799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.045
- Twilight #4E518B ΔE 0.050
- Blueberry #464196 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.061
- Dusk #4E5481 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.075
- Iris #6258C4 ΔE 0.075
- Dusky Blue #475F94 ΔE 0.076
Use #644799 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.