#6B3778
Closest named color: Rebecca Purple (#663399). oklch(43.1% 0.118 319.3), rgb(107, 55, 120).
Aa
White text reads best on this color (8.59:1).
About this color
#6B3778 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.118 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.058 away. White text reads best on it, at 8.59:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #6B3778 |
| RGB | rgb(107, 55, 120) |
| HSL | hsl(288, 37%, 34%) |
| OKLCH | oklch(43.1% 0.118 319.3) |
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 #6B3778 | 8.59:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #6B3778 | 2.44:1 | Fails | Lc 14.8 | Not readable |
| #6B3778 text on white | 8.59:1 | AAA | Lc 89.2 | Fine for body text |
| #6B3778 text on black | 2.44:1 | Fails | Lc -13.0 | Not readable |
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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#F0E6F2
oklch(93.6% 0.019 320.6)
-
Step 200
200
#E5D2E9
oklch(88.6% 0.037 320.4)
-
Step 300
300
#D4B3DD
oklch(80.9% 0.068 318.9)
-
Step 400
400
#BE8ACC
oklch(70.7% 0.11 319)
-
Step 500
500
#AE6BBF
oklch(63.2% 0.141 319.3)
-
Step 600
600
#9951AB
oklch(55.7% 0.153 319.3)
-
Step 700
700
#824193
oklch(49.1% 0.142 318.9)
-
Step 800
800 (this color)
#6B3778
oklch(43.1% 0.118 319.3)
-
Step 900
900
#563060
oklch(37.8% 0.091 319)
-
Step 950
950
#331C38
oklch(27% 0.059 320.3)
#6B3778 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) | #2B487A | 0.108 |
| Deuteranopia (no green cones) | #3B4E76 | 0.097 |
| Tritanopia (no blue cones) | #6B4052 | 0.074 |
| Achromatopsia (no color) | #4C4C4C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3778
#6B3778
oklch(43.1% 0.118 319.3)
- #285E17
#285E17
oklch(42.9% 0.117 139.3)
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 #6B3778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.072
- Light Eggplant #894585 ΔE 0.072
- Purple #800080 ΔE 0.080
- Twilight #4E518B ΔE 0.081
- Blueberry #464196 ΔE 0.083
- Dusk #4E5481 ΔE 0.086
- Brownish Purple #76424E ΔE 0.087
Use #6B3778 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.