#644CCE
Closest named color: Bluey Purple (#6241C7). oklch(51.6% 0.192 286), rgb(100, 76, 206).
Aa
White text reads best on this color (6.05:1).
About this color
#644CCE is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.192 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.026 away. White text reads best on it, at 6.05:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.46:1 |
| White text | 6.05:1 |
Values
| HEX | #644CCE |
| RGB | rgb(100, 76, 206) |
| HSL | hsl(251, 57%, 55%) |
| OKLCH | oklch(51.6% 0.192 286) |
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 #644CCE | 6.05:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #644CCE | 3.46:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #644CCE text on white | 6.05:1 | AA | Lc 79.8 | Fine for body text |
| #644CCE text on black | 3.46:1 | AA large text | Lc -22.1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FC
oklch(93.7% 0.027 285.9)
-
Step 200
200
#D5D5FA
oklch(88.5% 0.051 285.3)
-
Step 300
300
#BBB8FA
oklch(80.8% 0.093 286.2)
-
Step 400
400
#9A91F8
oklch(70.8% 0.148 286)
-
Step 500
500
#8371F5
oklch(63.1% 0.19 285.8)
-
Step 600
600
#6F55E3
oklch(55.6% 0.206 286)
-
Step 700
700 (this color)
#644CCE
oklch(51.6% 0.192 286)
-
Step 800
800
#4C39A0
oklch(42.7% 0.159 286)
-
Step 900
900
#3F337F
oklch(37.8% 0.123 286.1)
-
Step 950
950
#241E4A
oklch(26.9% 0.079 286.1)
#644CCE 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) | #0066D2 | 0.096 |
| Deuteranopia (no green cones) | #005FCB | 0.093 |
| Tritanopia (no blue cones) | #3B6B86 | 0.158 |
| Achromatopsia (no color) | #626262 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644CCE
#644CCE
oklch(51.6% 0.192 286)
- #716B00
#716B00
oklch(51.7% 0.11 105.8)
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 #644CCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.026
- Iris #6258C4 ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.034
- Light Indigo #6D5ACF ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Blurple #5539CC ΔE 0.048
Use #644CCE 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.