#644AC4
Closest named color: Bluey Purple (#6241C7). oklch(50.5% 0.181 287.9), rgb(100, 74, 196).
Aa
White text reads best on this color (6.32:1).
About this color
#644AC4 is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.181 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.020 away. White text reads best on it, at 6.32:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.31:1 |
| White text | 6.32:1 |
Values
| HEX | #644AC4 |
| RGB | rgb(100, 74, 196) |
| HSL | hsl(253, 51%, 53%) |
| OKLCH | oklch(50.5% 0.181 287.9) |
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 #644AC4 | 6.32:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #644AC4 | 3.31:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #644AC4 text on white | 6.32:1 | AA | Lc 81.0 | Fine for body text |
| #644AC4 text on black | 3.31:1 | AA large text | Lc -20.8 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D7D5F8
oklch(88.6% 0.048 288)
-
Step 300
300
#BDB8F7
oklch(80.9% 0.088 287.9)
-
Step 400
400
#9D91F3
oklch(70.8% 0.141 287.9)
-
Step 500
500
#8772EE
oklch(63.1% 0.179 287.9)
-
Step 600
600
#7256DC
oklch(55.5% 0.195 287.9)
-
Step 700
700 (this color)
#644AC4
oklch(50.5% 0.181 287.9)
-
Step 800
800
#4E3A9B
oklch(42.7% 0.151 287.7)
-
Step 900
900
#40337B
oklch(37.6% 0.118 287.7)
-
Step 950
950
#251F48
oklch(27% 0.074 287.1)
#644AC4 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) | #0062C8 | 0.098 |
| Deuteranopia (no green cones) | #005CC1 | 0.096 |
| Tritanopia (no blue cones) | #436780 | 0.150 |
| Achromatopsia (no color) | #606060 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644AC4
#644AC4
oklch(50.5% 0.181 287.9)
- #6B6900
#6B6900
oklch(50.6% 0.109 108.4)
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 #644AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.020
- Iris #6258C4 ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Blurple #5539CC ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.051
- Warm Blue #4B57DB ΔE 0.055
Use #644AC4 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.