#6645BB
Closest named color: Bluey Purple (#6241C7). oklch(49.2% 0.177 291.4), rgb(102, 69, 187).
Aa
White text reads best on this color (6.70:1).
About this color
#6645BB is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.177 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.022 away. White text reads best on it, at 6.70:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #6645BB |
| RGB | rgb(102, 69, 187) |
| HSL | hsl(257, 46%, 50%) |
| OKLCH | oklch(49.2% 0.177 291.4) |
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 #6645BB | 6.70:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #6645BB | 3.13:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #6645BB text on white | 6.70:1 | AA | Lc 82.6 | Fine for body text |
| #6645BB text on black | 3.13:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D9D4F7
oklch(88.5% 0.048 291.9)
-
Step 300
300
#C1B7F4
oklch(80.9% 0.086 291.9)
-
Step 400
400
#A290EF
oklch(70.8% 0.137 291.2)
-
Step 500
500
#8D71E9
oklch(63.2% 0.174 291.3)
-
Step 600
600
#7855D7
oklch(55.5% 0.19 291.3)
-
Step 700
700 (this color)
#6645BB
oklch(49.2% 0.177 291.4)
-
Step 800
800
#533997
oklch(42.7% 0.147 291.7)
-
Step 900
900
#443378
oklch(37.8% 0.113 291.4)
-
Step 950
950
#281E46
oklch(27% 0.072 292.4)
#6645BB 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) | #005EBF | 0.105 |
| Deuteranopia (no green cones) | #0059B9 | 0.104 |
| Tritanopia (no blue cones) | #4D6179 | 0.144 |
| Achromatopsia (no color) | #5C5C5C | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6645BB
#6645BB
oklch(49.2% 0.177 291.4)
- #646600
#646600
oklch(49.2% 0.108 111.1)
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 #6645BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.022
- Blue With A Hint Of Purple #533CC6 ΔE 0.044
- Iris #6258C4 ΔE 0.044
- Blurple #5539CC ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.057
- Rebecca Purple #663399 ΔE 0.065
- Dark Periwinkle #665FD1 ΔE 0.066
Use #6645BB 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.