#6C51B5
Closest named color: Iris (#6258C4). oklch(51.3% 0.152 292.7), rgb(108, 81, 181).
Aa
White text reads best on this color (6.03:1).
About this color
#6C51B5 is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.152 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.031 away. White text reads best on it, at 6.03:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.48:1 |
| White text | 6.03:1 |
Values
| HEX | #6C51B5 |
| RGB | rgb(108, 81, 181) |
| HSL | hsl(256, 40%, 51%) |
| OKLCH | oklch(51.3% 0.152 292.7) |
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 #6C51B5 | 6.03:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #6C51B5 | 3.48:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #6C51B5 text on white | 6.03:1 | AA | Lc 79.9 | Fine for body text |
| #6C51B5 text on black | 3.48:1 | AA large text | Lc -22.0 | 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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F7
oklch(93.7% 0.02 292.1)
-
Step 200
200
#D9D5F3
oklch(88.5% 0.041 291.7)
-
Step 300
300
#C2B8ED
oklch(80.9% 0.075 293.3)
-
Step 400
400
#A392E3
oklch(70.6% 0.117 292.8)
-
Step 500
500
#8E75DB
oklch(63.1% 0.15 292.9)
-
Step 600
600
#795BC9
oklch(55.6% 0.164 292.8)
-
Step 700
700 (this color)
#6C51B5
oklch(51.3% 0.152 292.7)
-
Step 800
800
#533E8D
oklch(42.8% 0.126 292.5)
-
Step 900
900
#443570
oklch(37.6% 0.098 292.8)
-
Step 950
950
#282042
oklch(27.1% 0.062 292.6)
#6C51B5 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) | #2064B8 | 0.095 |
| Deuteranopia (no green cones) | #2761B3 | 0.090 |
| Tritanopia (no blue cones) | #59667B | 0.123 |
| Achromatopsia (no color) | #636363 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C51B5
#6C51B5
oklch(51.3% 0.152 292.7)
- #686D00
#686D00
oklch(51.3% 0.114 112.9)
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 #6C51B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.044
- Bluey Purple #6241C7 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.052
- Deep Lavender #8D5EB7 ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Warm Blue #4B57DB ΔE 0.076
Use #6C51B5 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.