#644FBD
Closest named color: Iris (#6258C4). oklch(50.8% 0.166 287.8), rgb(100, 79, 189).
Aa
White text reads best on this color (6.18:1).
About this color
#644FBD is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.166 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.023 away. White text reads best on it, at 6.18:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #644FBD |
| RGB | rgb(100, 79, 189) |
| HSL | hsl(251, 45%, 53%) |
| OKLCH | oklch(50.8% 0.166 287.8) |
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 #644FBD | 6.18:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #644FBD | 3.39:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #644FBD text on white | 6.18:1 | AA | Lc 80.5 | Fine for body text |
| #644FBD text on black | 3.39:1 | AA large text | Lc -21.3 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D7D5F6
oklch(88.5% 0.045 288.2)
-
Step 300
300
#BDB9F2
oklch(80.9% 0.08 287.7)
-
Step 400
400
#9D93EC
oklch(70.8% 0.128 287.8)
-
Step 500
500
#8675E6
oklch(63.1% 0.165 287.6)
-
Step 600
600
#715BD4
oklch(55.6% 0.179 287.5)
-
Step 700
700 (this color)
#644FBD
oklch(50.8% 0.166 287.8)
-
Step 800
800
#4E3D94
oklch(42.7% 0.137 288.2)
-
Step 900
900
#403576
oklch(37.6% 0.107 287.9)
-
Step 950
950
#252045
oklch(27% 0.067 287.2)
#644FBD 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) | #0064C1 | 0.095 |
| Deuteranopia (no green cones) | #005EBB | 0.093 |
| Tritanopia (no blue cones) | #47687E | 0.138 |
| Achromatopsia (no color) | #616161 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644FBD
#644FBD
oklch(50.8% 0.166 287.8)
- #6C6900
#6C6900
oklch(50.7% 0.109 107.8)
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 #644FBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.023
- Bluey Purple #6241C7 ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.036
- Light Indigo #6D5ACF ΔE 0.040
- Dark Periwinkle #665FD1 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.060
- Blurple #5539CC ΔE 0.060
Use #644FBD 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.