#644FA1
Closest named color: Twilight (#4E518B). oklch(48.9% 0.128 292.9), rgb(100, 79, 161).
Aa
White text reads best on this color (6.61:1).
About this color
#644FA1 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.128 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.051 away. White text reads best on it, at 6.61:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #644FA1 |
| RGB | rgb(100, 79, 161) |
| HSL | hsl(255, 34%, 47%) |
| OKLCH | oklch(48.9% 0.128 292.9) |
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 #644FA1 | 6.61:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #644FA1 | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #644FA1 text on white | 6.61:1 | AA | Lc 82.5 | Fine for body text |
| #644FA1 text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D5EE
oklch(88.4% 0.034 293)
-
Step 300
300
#C1BAE6
oklch(80.9% 0.062 292.3)
-
Step 400
400
#A395D9
oklch(70.8% 0.099 293.2)
-
Step 500
500
#8D79CF
oklch(63.1% 0.127 293.1)
-
Step 600
600
#7761BC
oklch(55.6% 0.138 292.5)
-
Step 700
700 (this color)
#644FA1
oklch(48.9% 0.128 292.9)
-
Step 800
800
#524283
oklch(42.8% 0.105 292.7)
-
Step 900
900
#443869
oklch(37.7% 0.082 293.3)
-
Step 950
950
#27213E
oklch(27% 0.053 291.9)
#644FA1 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) | #2F5EA4 | 0.075 |
| Deuteranopia (no green cones) | #335B9F | 0.071 |
| Tritanopia (no blue cones) | #555F70 | 0.103 |
| Achromatopsia (no color) | #5D5D5D | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644FA1
#644FA1
oklch(48.9% 0.128 292.9)
- #616600
#616600
oklch(48.9% 0.109 113.1)
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 #644FA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.051
- Iris #6258C4 ΔE 0.057
- Rebecca Purple #663399 ΔE 0.064
- Dusky Blue #475F94 ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Dusk #4E5481 ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.071
Use #644FA1 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.