#6B5BCC
Closest named color: Slate Blue (#6A5ACD). oklch(54.5% 0.168 285.8), rgb(107, 91, 204).
Aa
White text reads best on this color (5.25:1).
About this color
#6B5BCC is a medium-dark, vivid purple. In OKLCH its lightness is 55%, its chroma 0.168 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.003 away. White text reads best on it, at 5.25:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #6B5BCC |
| RGB | rgb(107, 91, 204) |
| HSL | hsl(248, 53%, 58%) |
| OKLCH | oklch(54.5% 0.168 285.8) |
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 #6B5BCC | 5.25:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #6B5BCC | 3.99:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #6B5BCC text on white | 5.25:1 | AA | Lc 75.8 | Fine for body text |
| #6B5BCC text on black | 3.99:1 | AA large text | Lc -25.9 | 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 600.
-
Step 50
50
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAF0
oklch(80.9% 0.076 286.3)
-
Step 400
400
#9A95E9
oklch(70.8% 0.121 285.6)
-
Step 500
500
#8378E2
oklch(63.1% 0.155 285.8)
-
Step 600
600 (this color)
#6B5BCC
oklch(54.5% 0.168 285.8)
-
Step 700
700
#5C4DB4
oklch(49.1% 0.157 285.7)
-
Step 800
800
#4B4091
oklch(42.7% 0.129 285.8)
-
Step 900
900
#3E3774
oklch(37.7% 0.101 285.7)
-
Step 950
950
#242144
oklch(27.1% 0.064 285.2)
#6B5BCC 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) | #176FD0 | 0.089 |
| Deuteranopia (no green cones) | #1369CA | 0.089 |
| Tritanopia (no blue cones) | #4A748B | 0.141 |
| Achromatopsia (no color) | #6C6C6C | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B5BCC
#6B5BCC
oklch(54.5% 0.168 285.8)
- #7A7400
#7A7400
oklch(54.7% 0.117 106.1)
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 #6B5BCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.003
- Light Indigo #6D5ACF ΔE 0.006
- Dark Periwinkle #665FD1 ΔE 0.013
- Iris #6258C4 ΔE 0.020
- Warm Blue #4B57DB ΔE 0.054
- Purpley #8756E4 ΔE 0.059
- Bluey Purple #6241C7 ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.064
Use #6B5BCC 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.