#644DA6
Closest named color: Iris (#6258C4). oklch(48.9% 0.138 292.5), rgb(100, 77, 166).
Aa
White text reads best on this color (6.65:1).
About this color
#644DA6 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.138 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.052 away. White text reads best on it, at 6.65:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #644DA6 |
| RGB | rgb(100, 77, 166) |
| HSL | hsl(256, 37%, 48%) |
| OKLCH | oklch(48.9% 0.138 292.5) |
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 #644DA6 | 6.65:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #644DA6 | 3.15:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #644DA6 text on white | 6.65:1 | AA | Lc 82.7 | Fine for body text |
| #644DA6 text on black | 3.15:1 | AA large text | Lc -19.3 | 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
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#D9D5F0
oklch(88.4% 0.037 292.4)
-
Step 300
300
#C1B9E9
oklch(80.8% 0.068 292.5)
-
Step 400
400
#A294DD
oklch(70.7% 0.106 292.3)
-
Step 500
500
#8D78D4
oklch(63.2% 0.136 292.6)
-
Step 600
600
#775FC1
oklch(55.6% 0.148 292.2)
-
Step 700
700 (this color)
#644DA6
oklch(48.9% 0.138 292.5)
-
Step 800
800
#524087
oklch(42.7% 0.114 292.6)
-
Step 900
900
#44376C
oklch(37.7% 0.089 292.9)
-
Step 950
950
#27213F
oklch(27% 0.055 291.5)
#644DA6 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) | #265EA9 | 0.083 |
| Deuteranopia (no green cones) | #2B5BA4 | 0.079 |
| Tritanopia (no blue cones) | #535F72 | 0.111 |
| Achromatopsia (no color) | #5C5C5C | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644DA6
#644DA6
oklch(48.9% 0.138 292.5)
- #626600
#626600
oklch(49% 0.109 112.4)
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 #644DA6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.052
- Twilight #4E518B ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.060
- Blueberry #464196 ΔE 0.065
- Slate Blue #6A5ACD ΔE 0.067
- Light Indigo #6D5ACF ΔE 0.071
- Dusky Blue #475F94 ΔE 0.071
Use #644DA6 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.