#644F8A
Closest named color: Twilight (#4E518B). oklch(47.5% 0.095 299.2), rgb(100, 79, 138).
Aa
White text reads best on this color (6.93:1).
About this color
#644F8A is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.095 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 6.93:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #644F8A |
| RGB | rgb(100, 79, 138) |
| HSL | hsl(261, 27%, 43%) |
| OKLCH | oklch(47.5% 0.095 299.2) |
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 #644F8A | 6.93:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #644F8A | 3.02:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #644F8A text on white | 6.93:1 | AA | Lc 83.9 | Fine for body text |
| #644F8A text on black | 3.02:1 | AA large text | Lc -18.1 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EBE8F2
oklch(93.6% 0.014 299.8)
-
Step 200
200
#DBD6E8
oklch(88.5% 0.025 298.6)
-
Step 300
300
#C4BBDB
oklch(81% 0.046 298.2)
-
Step 400
400
#A797C9
oklch(70.8% 0.074 299.2)
-
Step 500
500
#917CBB
oklch(63% 0.095 299)
-
Step 600
600
#7C65A7
oklch(55.7% 0.103 299.1)
-
Step 700
700 (this color)
#644F8A
oklch(47.5% 0.095 299.2)
-
Step 800
800
#554574
oklch(42.8% 0.078 298.7)
-
Step 900
900
#463A5E
oklch(37.7% 0.062 298.7)
-
Step 950
950
#292237
oklch(27% 0.039 299.1)
#644F8A 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) | #3F5A8C | 0.059 |
| Deuteranopia (no green cones) | #435988 | 0.055 |
| Tritanopia (no blue cones) | #5D5966 | 0.074 |
| Achromatopsia (no color) | #5A5A5A | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F8A
#644F8A
oklch(47.5% 0.095 299.2)
- #56631D
#56631D
oklch(47.4% 0.095 119.2)
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 #644F8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusk #4E5481 ΔE 0.041
- Dusty Grape #545775 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.057
- Muted Purple #805B87 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.063
- Light Eggplant #894585 ΔE 0.069
- Dull Purple #84597E ΔE 0.070
Use #644F8A 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.