#6B3978
Closest named color: Rebecca Purple (#663399). oklch(43.4% 0.114 319.1), rgb(107, 57, 120).
Aa
White text reads best on this color (8.46:1).
About this color
#6B3978 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.114 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 0.059 away. White text reads best on it, at 8.46:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.48:1 |
| White text | 8.46:1 |
Values
| HEX | #6B3978 |
| RGB | rgb(107, 57, 120) |
| HSL | hsl(288, 36%, 35%) |
| OKLCH | oklch(43.4% 0.114 319.1) |
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 #6B3978 | 8.46:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #6B3978 | 2.48:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #6B3978 text on white | 8.46:1 | AAA | Lc 88.8 | Fine for body text |
| #6B3978 text on black | 2.48:1 | Fails | Lc -13.4 | 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
#E4D2E9
oklch(88.5% 0.037 318.9)
-
Step 300
300
#D4B3DC
oklch(80.8% 0.067 319.6)
-
Step 400
400
#BD8BCB
oklch(70.7% 0.106 318.7)
-
Step 500
500
#AC6CBD
oklch(63% 0.136 319)
-
Step 600
600
#9752A9
oklch(55.5% 0.148 319)
-
Step 700
700
#814291
oklch(49% 0.138 319.2)
-
Step 800
800 (this color)
#6B3978
oklch(43.4% 0.114 319.1)
-
Step 900
900
#55305F
oklch(37.6% 0.089 318.8)
-
Step 950
950
#321D38
oklch(27.1% 0.056 318.5)
#6B3978 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) | #2E4A7A | 0.104 |
| Deuteranopia (no green cones) | #3D4F76 | 0.093 |
| Tritanopia (no blue cones) | #6B4253 | 0.072 |
| Achromatopsia (no color) | #4D4D4D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3978
#6B3978
oklch(43.4% 0.114 319.1)
- #2B5F1A
#2B5F1A
oklch(43.4% 0.115 139)
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 #6B3978, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.059
- Light Eggplant #894585 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.071
- Twilight #4E518B ΔE 0.077
- Dusk #4E5481 ΔE 0.082
- Blueberry #464196 ΔE 0.082
- Purple #800080 ΔE 0.084
- Brownish Purple #76424E ΔE 0.084
Use #6B3978 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.