#6B3C88
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.128 310.8), rgb(107, 60, 136).
Aa
White text reads best on this color (7.99:1).
About this color
#6B3C88 is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.128 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.038 away. White text reads best on it, at 7.99:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #6B3C88 |
| RGB | rgb(107, 60, 136) |
| HSL | hsl(277, 39%, 38%) |
| OKLCH | oklch(44.8% 0.128 310.8) |
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 #6B3C88 | 7.99:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #6B3C88 | 2.62:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #6B3C88 text on white | 7.99:1 | AAA | Lc 87.4 | Fine for body text |
| #6B3C88 text on black | 2.62:1 | Fails | Lc -14.7 | 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
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E2D2EE
oklch(88.5% 0.042 310.9)
-
Step 300
300
#D0B4E5
oklch(81% 0.074 310.5)
-
Step 400
400
#B88BD7
oklch(70.7% 0.118 310.7)
-
Step 500
500
#A76BCD
oklch(63.1% 0.154 311)
-
Step 600
600
#9251B9
oklch(55.6% 0.165 311)
-
Step 700
700
#7C41A0
oklch(49.1% 0.154 310.6)
-
Step 800
800 (this color)
#6B3C88
oklch(44.8% 0.128 310.8)
-
Step 900
900
#523068
oklch(37.7% 0.099 310.5)
-
Step 950
950
#301C3D
oklch(26.9% 0.064 310.7)
#6B3C88 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) | #264E8B | 0.108 |
| Deuteranopia (no green cones) | #365186 | 0.096 |
| Tritanopia (no blue cones) | #68495C | 0.088 |
| Achromatopsia (no color) | #515151 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3C88
#6B3C88
oklch(44.8% 0.128 310.8)
- #3C6100
#3C6100
oklch(44.7% 0.122 130.7)
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 #6B3C88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.064
- Light Eggplant #894585 ΔE 0.065
- Twilight #4E518B ΔE 0.069
- Blueberry #464196 ΔE 0.069
- Dusk #4E5481 ΔE 0.079
- Warm Purple #952E8F ΔE 0.084
- Purple #800080 ΔE 0.086
Use #6B3C88 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.