#6B3C99
Closest named color: Rebecca Purple (#663399). oklch(45.9% 0.148 304.5), rgb(107, 60, 153).
Aa
White text reads best on this color (7.68:1).
About this color
#6B3C99 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.148 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.023 away. White text reads best on it, at 7.68:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #6B3C99 |
| RGB | rgb(107, 60, 153) |
| HSL | hsl(270, 44%, 42%) |
| OKLCH | oklch(45.9% 0.148 304.5) |
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 #6B3C99 | 7.68:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #6B3C99 | 2.73:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #6B3C99 text on white | 7.68:1 | AAA | Lc 86.3 | Fine for body text |
| #6B3C99 text on black | 2.73:1 | Fails | Lc -15.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#DFD3EF
oklch(88.5% 0.04 304.9)
-
Step 300
300
#CBB6E7
oklch(81% 0.071 304.3)
-
Step 400
400
#B18EDA
oklch(70.7% 0.114 304.8)
-
Step 500
500
#9E70D0
oklch(63.1% 0.146 304.7)
-
Step 600
600
#8956BD
oklch(55.6% 0.159 304.6)
-
Step 700
700 (this color)
#6B3C99
oklch(45.9% 0.148 304.5)
-
Step 800
800
#5E3A84
oklch(42.7% 0.122 304.2)
-
Step 900
900
#4D326A
oklch(37.6% 0.096 304.4)
-
Step 950
950
#2D1E3E
oklch(27% 0.06 304.3)
#6B3C99 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) | #0F529C | 0.120 |
| Deuteranopia (no green cones) | #275397 | 0.108 |
| Tritanopia (no blue cones) | #634F64 | 0.110 |
| Achromatopsia (no color) | #535353 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3C99
#6B3C99
oklch(45.9% 0.148 304.5)
- #4A6200
#4A6200
oklch(46% 0.115 124.6)
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 #6B3C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.023
- Blueberry #464196 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.067
- Twilight #4E518B ΔE 0.074
- Light Eggplant #894585 ΔE 0.075
- Bluey Purple #6241C7 ΔE 0.076
- Grape #7209B7 ΔE 0.081
- Warm Purple #952E8F ΔE 0.085
Use #6B3C99 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.