#6641AB
Closest named color: Rebecca Purple (#663399). oklch(47.4% 0.162 295.6), rgb(102, 65, 171).
Aa
White text reads best on this color (7.21:1).
About this color
#6641AB is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.162 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.040 away. White text reads best on it, at 7.21:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.90:1 |
| White text | 7.21:1 |
Values
| HEX | #6641AB |
| RGB | rgb(102, 65, 171) |
| HSL | hsl(261, 45%, 46%) |
| OKLCH | oklch(47.4% 0.162 295.6) |
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 #6641AB | 7.21:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #6641AB | 2.90:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #6641AB text on white | 7.21:1 | AAA | Lc 84.6 | Fine for body text |
| #6641AB text on black | 2.90:1 | Fails | Lc -17.4 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DBD4F3
oklch(88.5% 0.043 295.9)
-
Step 300
300
#C4B7EE
oklch(80.9% 0.078 295.4)
-
Step 400
400
#A790E6
oklch(70.8% 0.125 295.3)
-
Step 500
500
#9371DE
oklch(63% 0.16 295.8)
-
Step 600
600
#7E57CC
oklch(55.6% 0.174 295.6)
-
Step 700
700 (this color)
#6641AB
oklch(47.4% 0.162 295.6)
-
Step 800
800
#573A8F
oklch(42.7% 0.135 295.9)
-
Step 900
900
#473372
oklch(37.7% 0.105 295.6)
-
Step 950
950
#2A1E43
oklch(27% 0.067 296.6)
#6641AB 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) | #0058AE | 0.110 |
| Deuteranopia (no green cones) | #0556A9 | 0.109 |
| Tritanopia (no blue cones) | #555970 | 0.127 |
| Achromatopsia (no color) | #575757 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6641AB
#6641AB
oklch(47.4% 0.162 295.6)
- #5A6300
#5A6300
oklch(47.5% 0.108 115.8)
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 #6641AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.040
- Bluey Purple #6241C7 ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Iris #6258C4 ΔE 0.063
- Blurple #5539CC ΔE 0.064
- Blueberry #464196 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.074
- Slate Blue #6A5ACD ΔE 0.076
Use #6641AB 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.