#644683
Closest named color: Twilight (#4E518B). oklch(45.4% 0.101 305.4), rgb(100, 70, 131).
Aa
White text reads best on this color (7.64:1).
About this color
#644683 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.101 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.044 away. White text reads best on it, at 7.64:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #644683 |
| RGB | rgb(100, 70, 131) |
| HSL | hsl(270, 30%, 39%) |
| OKLCH | oklch(45.4% 0.101 305.4) |
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 #644683 | 7.64:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #644683 | 2.74:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #644683 text on white | 7.64:1 | AAA | Lc 86.4 | Fine for body text |
| #644683 text on black | 2.74:1 | Fails | Lc -15.7 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DED4EB
oklch(88.5% 0.033 305.3)
-
Step 300
300
#CAB7E0
oklch(80.9% 0.06 306.1)
-
Step 400
400
#AF91D0
oklch(70.7% 0.096 305.9)
-
Step 500
500
#9B75C4
oklch(63.1% 0.122 305.3)
-
Step 600
600
#865CB0
oklch(55.5% 0.132 305.6)
-
Step 700
700
#724C97
oklch(49.2% 0.122 305.8)
-
Step 800
800 (this color)
#644683
oklch(45.4% 0.101 305.4)
-
Step 900
900
#4C3663
oklch(37.8% 0.079 305.5)
-
Step 950
950
#2C203A
oklch(27% 0.049 304.5)
#644683 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) | #365285 | 0.073 |
| Deuteranopia (no green cones) | #3E5481 | 0.068 |
| Tritanopia (no blue cones) | #5F505E | 0.075 |
| Achromatopsia (no color) | #535353 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644683
#644683
oklch(45.4% 0.101 305.4)
- #496016
#496016
oklch(45.5% 0.102 125.5)
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 #644683, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.044
- Dusk #4E5481 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.060
- Rebecca Purple #663399 ΔE 0.061
- Dusty Grape #545775 ΔE 0.062
- Blueberry #464196 ΔE 0.064
- Light Eggplant #894585 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.077
Use #644683 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.