#6C3799
Closest named color: Rebecca Purple (#663399). oklch(45.3% 0.156 306), rgb(108, 55, 153).
Aa
White text reads best on this color (7.94:1).
About this color
#6C3799 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.156 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.015 away. White text reads best on it, at 7.94:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.64:1 |
| White text | 7.94:1 |
Values
| HEX | #6C3799 |
| RGB | rgb(108, 55, 153) |
| HSL | hsl(272, 47%, 41%) |
| OKLCH | oklch(45.3% 0.156 306) |
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 #6C3799 | 7.94:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #6C3799 | 2.64:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #6C3799 text on white | 7.94:1 | AAA | Lc 87.0 | Fine for body text |
| #6C3799 text on black | 2.64:1 | 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
#F7F3FC
oklch(97% 0.013 306)
-
Step 100
100
#EEE6F8
oklch(93.6% 0.025 305.8)
-
Step 200
200
#E1D1F4
oklch(88.4% 0.05 306)
-
Step 300
300
#CFB2F0
oklch(81% 0.091 305.8)
-
Step 400
400
#B787E8
oklch(70.7% 0.145 305.8)
-
Step 500
500
#A664E1
oklch(63.1% 0.187 306.1)
-
Step 600
600
#9147CF
oklch(55.6% 0.203 305.8)
-
Step 700
700
#7C37B3
oklch(49.1% 0.189 306)
-
Step 800
800 (this color)
#6C3799
oklch(45.3% 0.156 306)
-
Step 900
900
#522B73
oklch(37.6% 0.122 306.4)
-
Step 950
950
#301A44
oklch(27% 0.078 306)
#6C3799 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) | #004F9C | 0.131 |
| Deuteranopia (no green cones) | #215197 | 0.118 |
| Tritanopia (no blue cones) | #644B63 | 0.111 |
| Achromatopsia (no color) | #515151 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C3799
#6C3799
oklch(45.3% 0.156 306)
- #466100
#466100
oklch(45.4% 0.116 126.2)
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 #6C3799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.015
- Blueberry #464196 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.069
- Grape #7209B7 ΔE 0.073
- Bluey Purple #6241C7 ΔE 0.078
- Light Eggplant #894585 ΔE 0.079
- Warm Purple #952E8F ΔE 0.083
- Twilight #4E518B ΔE 0.083
Use #6C3799 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.