#644688
Closest named color: Twilight (#4E518B). oklch(45.7% 0.108 303.4), rgb(100, 70, 136).
Aa
White text reads best on this color (7.57:1).
About this color
#644688 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.108 and its hue 303°. 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 7.57:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #644688 |
| RGB | rgb(100, 70, 136) |
| HSL | hsl(267, 32%, 40%) |
| OKLCH | oklch(45.7% 0.108 303.4) |
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 #644688 | 7.57:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #644688 | 2.77:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #644688 text on white | 7.57:1 | AAA | Lc 86.1 | Fine for body text |
| #644688 text on black | 2.77:1 | Fails | Lc -15.9 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DED4ED
oklch(88.6% 0.036 303.8)
-
Step 300
300
#C9B7E3
oklch(80.9% 0.064 303.6)
-
Step 400
400
#AE91D4
oklch(70.7% 0.1 303.8)
-
Step 500
500
#9A74C9
oklch(63.1% 0.13 303.5)
-
Step 600
600
#855BB6
oklch(55.6% 0.141 303.4)
-
Step 700
700
#714B9C
oklch(49.2% 0.129 303.7)
-
Step 800
800 (this color)
#644688
oklch(45.7% 0.108 303.4)
-
Step 900
900
#4B3566
oklch(37.7% 0.085 303.3)
-
Step 950
950
#2C1F3C
oklch(27% 0.055 303.6)
#644688 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) | #33538A | 0.077 |
| Deuteranopia (no green cones) | #3B5486 | 0.070 |
| Tritanopia (no blue cones) | #5E5260 | 0.083 |
| Achromatopsia (no color) | #545454 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644688
#644688
oklch(45.7% 0.108 303.4)
- #4C6009
#4C6009
oklch(45.6% 0.108 123)
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 #644688, 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 0.053
- Rebecca Purple #663399 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.060
- Dusty Grape #545775 ΔE 0.067
- Light Eggplant #894585 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.076
Use #644688 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.