#644BC5
Closest named color: Bluey Purple (#6241C7). oklch(50.8% 0.181 287.5), rgb(100, 75, 197).
Aa
White text reads best on this color (6.26:1).
About this color
#644BC5 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 0.022 away. White text reads best on it, at 6.26:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #644BC5 |
| RGB | rgb(100, 75, 197) |
| HSL | hsl(252, 51%, 53%) |
| OKLCH | oklch(50.8% 0.181 287.5) |
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 #644BC5 | 6.26:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #644BC5 | 3.35:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #644BC5 text on white | 6.26:1 | AA | Lc 80.7 | Fine for body text |
| #644BC5 text on black | 3.35:1 | AA large text | Lc -21.1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BDB8F7
oklch(80.9% 0.088 287.9)
-
Step 400
400
#9C91F3
oklch(70.7% 0.141 287.4)
-
Step 500
500
#8672EE
oklch(63% 0.18 287.5)
-
Step 600
600
#7257DD
oklch(55.7% 0.195 287.6)
-
Step 700
700 (this color)
#644BC5
oklch(50.8% 0.181 287.5)
-
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)
#644BC5 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) | #0063C9 | 0.097 |
| Deuteranopia (no green cones) | #005DC2 | 0.095 |
| Tritanopia (no blue cones) | #426881 | 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°).
- #644BC5
#644BC5
oklch(50.8% 0.181 287.5)
- #6C6900
#6C6900
oklch(50.7% 0.109 107.8)
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 #644BC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.022
- Iris #6258C4 ΔE 0.030
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.041
- Blue With A Hint Of Purple #533CC6 ΔE 0.045
- Blurple #5539CC ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.054
Use #644BC5 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.