#6B3798
Closest named color: Rebecca Purple (#663399). oklch(45.1% 0.155 305.8), rgb(107, 55, 152).
Aa
White text reads best on this color (7.99:1).
About this color
#6B3798 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.155 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 0.014 away. White text reads best on it, at 7.99:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.155) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #6B3798 |
| RGB | rgb(107, 55, 152) |
| HSL | hsl(272, 47%, 41%) |
| OKLCH | oklch(45.1% 0.155 305.8) |
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 #6B3798 | 7.99:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #6B3798 | 2.62:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #6B3798 text on white | 7.99:1 | AAA | Lc 87.2 | Fine for body text |
| #6B3798 text on black | 2.62:1 | Fails | Lc -14.9 | 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
#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
#CFB2EF
oklch(80.9% 0.09 306.1)
-
Step 400
400
#B787E8
oklch(70.7% 0.145 305.8)
-
Step 500
500
#A565E0
oklch(63% 0.185 305.8)
-
Step 600
600
#9148CE
oklch(55.6% 0.201 305.9)
-
Step 700
700
#7B38B2
oklch(49.1% 0.186 305.7)
-
Step 800
800 (this color)
#6B3798
oklch(45.1% 0.155 305.8)
-
Step 900
900
#512C73
oklch(37.7% 0.12 305.4)
-
Step 950
950
#301A43
oklch(26.9% 0.077 306.7)
#6B3798 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) | #004F9B | 0.129 |
| Deuteranopia (no green cones) | #215196 | 0.117 |
| Tritanopia (no blue cones) | #634B62 | 0.112 |
| Achromatopsia (no color) | #515151 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3798
#6B3798
oklch(45.1% 0.155 305.8)
- #466000
#466000
oklch(45.1% 0.115 125.8)
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 #6B3798, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.014
- Dark Slate Blue #483D8B ΔE 0.067
- Blueberry #464196 ΔE 0.067
- Grape #7209B7 ΔE 0.074
- Bluey Purple #6241C7 ΔE 0.079
- Light Eggplant #894585 ΔE 0.080
- Twilight #4E518B ΔE 0.082
- Purple #800080 ΔE 0.084
Use #6B3798 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.