#644DAF
Closest named color: Iris (#6258C4). oklch(49.5% 0.15 290.7), rgb(100, 77, 175).
Aa
White text reads best on this color (6.51:1).
About this color
#644DAF is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.150 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.040 away. White text reads best on it, at 6.51:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #644DAF |
| RGB | rgb(100, 77, 175) |
| HSL | hsl(254, 39%, 49%) |
| OKLCH | oklch(49.5% 0.15 290.7) |
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 #644DAF | 6.51:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #644DAF | 3.22:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #644DAF text on white | 6.51:1 | AA | Lc 82.0 | Fine for body text |
| #644DAF text on black | 3.22:1 | AA large text | Lc -19.9 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F3
oklch(88.5% 0.041 290.1)
-
Step 300
300
#C0B9ED
oklch(80.9% 0.073 290.8)
-
Step 400
400
#A193E4
oklch(70.7% 0.117 291)
-
Step 500
500
#8B76DB
oklch(63% 0.148 291.1)
-
Step 600
600
#765DC9
oklch(55.6% 0.161 290.9)
-
Step 700
700 (this color)
#644DAF
oklch(49.5% 0.15 290.7)
-
Step 800
800
#513F8D
oklch(42.8% 0.124 290.8)
-
Step 900
900
#423670
oklch(37.6% 0.096 290.5)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#644DAF 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) | #195FB2 | 0.089 |
| Deuteranopia (no green cones) | #1E5CAD | 0.087 |
| Tritanopia (no blue cones) | #4F6276 | 0.123 |
| Achromatopsia (no color) | #5E5E5E | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644DAF
#644DAF
oklch(49.5% 0.15 290.7)
- #656700
#656700
oklch(49.5% 0.109 111.1)
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 #644DAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.040
- Bluey Purple #6241C7 ΔE 0.047
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Rebecca Purple #663399 ΔE 0.065
- Dark Periwinkle #665FD1 ΔE 0.065
- Blurple #5539CC ΔE 0.070
Use #644DAF 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.