#644AB9
Closest named color: Bluey Purple (#6241C7). oklch(49.7% 0.167 289.7), rgb(100, 74, 185).
Aa
White text reads best on this color (6.51:1).
About this color
#644AB9 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.167 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.030 away. White text reads best on it, at 6.51:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #644AB9 |
| RGB | rgb(100, 74, 185) |
| HSL | hsl(254, 44%, 51%) |
| OKLCH | oklch(49.7% 0.167 289.7) |
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 #644AB9 | 6.51:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #644AB9 | 3.22:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #644AB9 text on white | 6.51:1 | AA | Lc 81.9 | Fine for body text |
| #644AB9 text on black | 3.22:1 | AA large text | Lc -20.0 | 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
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D8D5F6
oklch(88.6% 0.045 289.6)
-
Step 300
300
#BFB8F2
oklch(80.8% 0.081 290)
-
Step 400
400
#9F92EC
oklch(70.8% 0.13 289.3)
-
Step 500
500
#8A74E5
oklch(63.2% 0.165 289.8)
-
Step 600
600
#7559D3
oklch(55.6% 0.18 289.8)
-
Step 700
700 (this color)
#644AB9
oklch(49.7% 0.167 289.7)
-
Step 800
800
#503C94
oklch(42.7% 0.139 289.7)
-
Step 900
900
#423476
oklch(37.6% 0.109 289.9)
-
Step 950
950
#261F45
oklch(26.9% 0.069 289.4)
#644AB9 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) | #0060BD | 0.099 |
| Deuteranopia (no green cones) | #005BB7 | 0.098 |
| Tritanopia (no blue cones) | #4A637A | 0.137 |
| Achromatopsia (no color) | #5E5E5E | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644AB9
#644AB9
oklch(49.7% 0.167 289.7)
- #676700
#676700
oklch(49.7% 0.108 109.8)
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 #644AB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.030
- Iris #6258C4 ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.052
- Blurple #5539CC ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.068
Use #644AB9 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.