#644FC4
Closest named color: Iris (#6258C4). oklch(51.3% 0.175 286.8), rgb(100, 79, 196).
Aa
White text reads best on this color (6.07:1).
About this color
#644FC4 is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.175 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.021 away. White text reads best on it, at 6.07:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #644FC4 |
| RGB | rgb(100, 79, 196) |
| HSL | hsl(251, 50%, 54%) |
| OKLCH | oklch(51.3% 0.175 286.8) |
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 #644FC4 | 6.07:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #644FC4 | 3.45:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #644FC4 text on white | 6.07:1 | AA | Lc 80.0 | Fine for body text |
| #644FC4 text on black | 3.45:1 | AA large text | Lc -21.9 | 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 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
#D6D5F7
oklch(88.4% 0.047 286.8)
-
Step 300
300
#BCB9F5
oklch(80.9% 0.084 286.6)
-
Step 400
400
#9B92F0
oklch(70.6% 0.135 286.8)
-
Step 500
500
#8574EB
oklch(63.1% 0.173 286.9)
-
Step 600
600
#7059D9
oklch(55.6% 0.188 286.9)
-
Step 700
700 (this color)
#644FC4
oklch(51.3% 0.175 286.8)
-
Step 800
800
#4D3C99
oklch(42.8% 0.145 286.9)
-
Step 900
900
#3F3579
oklch(37.8% 0.112 286.5)
-
Step 950
950
#251F47
oklch(26.9% 0.072 287.4)
#644FC4 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) | #0065C8 | 0.094 |
| Deuteranopia (no green cones) | #005FC2 | 0.092 |
| Tritanopia (no blue cones) | #436A82 | 0.145 |
| Achromatopsia (no color) | #626262 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644FC4
#644FC4
oklch(51.3% 0.175 286.8)
- #6F6A00
#6F6A00
oklch(51.2% 0.11 106.4)
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 #644FC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.021
- Bluey Purple #6241C7 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blurple #5539CC ΔE 0.056
Use #644FC4 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.