#644EB7
Closest named color: Iris (#6258C4). oklch(50.2% 0.159 289), rgb(100, 78, 183).
Aa
White text reads best on this color (6.33:1).
About this color
#644EB7 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.159 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.030 away. White text reads best on it, at 6.33:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #644EB7 |
| RGB | rgb(100, 78, 183) |
| HSL | hsl(253, 42%, 51%) |
| OKLCH | oklch(50.2% 0.159 289) |
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 #644EB7 | 6.33:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #644EB7 | 3.31:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #644EB7 text on white | 6.33:1 | AA | Lc 81.2 | Fine for body text |
| #644EB7 text on black | 3.31:1 | AA large text | Lc -20.7 | 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
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F4
oklch(88.5% 0.042 289.9)
-
Step 300
300
#BEB9F0
oklch(80.9% 0.077 288.7)
-
Step 400
400
#9E93E8
oklch(70.7% 0.123 288.8)
-
Step 500
500
#8876E1
oklch(63.1% 0.156 288.8)
-
Step 600
600
#735CCF
oklch(55.6% 0.171 288.8)
-
Step 700
700 (this color)
#644EB7
oklch(50.2% 0.159 289)
-
Step 800
800
#4F3E91
oklch(42.7% 0.131 289)
-
Step 900
900
#413674
oklch(37.8% 0.102 288.7)
-
Step 950
950
#262044
oklch(27% 0.065 288.9)
#644EB7 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) | #0962BB | 0.094 |
| Deuteranopia (no green cones) | #0E5DB5 | 0.091 |
| Tritanopia (no blue cones) | #4B657B | 0.130 |
| Achromatopsia (no color) | #606060 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644EB7
#644EB7
oklch(50.2% 0.159 289)
- #696800
#696800
oklch(50.2% 0.109 109.1)
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 #644EB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.030
- Bluey Purple #6241C7 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Blurple #5539CC ΔE 0.063
- Warm Blue #4B57DB ΔE 0.067
Use #644EB7 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.