#6B3B91
Closest named color: Rebecca Purple (#663399). oklch(45.2% 0.14 307.5), rgb(107, 59, 145).
Aa
White text reads best on this color (7.89:1).
About this color
#6B3B91 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.140 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.026 away. White text reads best on it, at 7.89:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #6B3B91 |
| RGB | rgb(107, 59, 145) |
| HSL | hsl(273, 42%, 40%) |
| OKLCH | oklch(45.2% 0.14 307.5) |
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 #6B3B91 | 7.89:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #6B3B91 | 2.65:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #6B3B91 text on white | 7.89:1 | AAA | Lc 87.0 | Fine for body text |
| #6B3B91 text on black | 2.65:1 | Fails | Lc -15.1 | 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 800.
-
Step 50
50
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E1D2F1
oklch(88.5% 0.045 307.2)
-
Step 300
300
#CFB3EA
oklch(80.9% 0.082 307.7)
-
Step 400
400
#B789E0
oklch(70.7% 0.132 307.6)
-
Step 500
500
#A569D7
oklch(63.1% 0.168 307.5)
-
Step 600
600
#904DC4
oklch(55.5% 0.183 307.4)
-
Step 700
700
#7B3DA9
oklch(49.1% 0.17 307.7)
-
Step 800
800 (this color)
#6B3B91
oklch(45.2% 0.14 307.5)
-
Step 900
900
#512E6E
oklch(37.7% 0.11 307.2)
-
Step 950
950
#301C40
oklch(27.1% 0.068 308.1)
#6B3B91 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) | #1A5094 | 0.117 |
| Deuteranopia (no green cones) | #2E528F | 0.104 |
| Tritanopia (no blue cones) | #654B60 | 0.100 |
| Achromatopsia (no color) | #515151 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3B91
#6B3B91
oklch(45.2% 0.14 307.5)
- #436100
#436100
oklch(45.2% 0.118 127.6)
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 #6B3B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.026
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Light Eggplant #894585 ΔE 0.070
- Twilight #4E518B ΔE 0.072
- Warm Purple #952E8F ΔE 0.083
- Dusk #4E5481 ΔE 0.086
- Purple #800080 ΔE 0.086
Use #6B3B91 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.