#6D57CB
Closest named color: Slate Blue (#6A5ACD). oklch(54% 0.173 287.9), rgb(109, 87, 203).
Aa
White text reads best on this color (5.41:1).
About this color
#6D57CB is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.173 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.008 away. White text reads best on it, at 5.41:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.87:1 |
| White text | 5.41:1 |
Values
| HEX | #6D57CB |
| RGB | rgb(109, 87, 203) |
| HSL | hsl(251, 53%, 57%) |
| OKLCH | oklch(54% 0.173 287.9) |
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 #6D57CB | 5.41:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #6D57CB | 3.87:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #6D57CB text on white | 5.41:1 | AA | Lc 76.7 | Fine for body text |
| #6D57CB text on black | 3.87:1 | AA large text | Lc -25.1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BDB9F1
oklch(80.8% 0.079 287.8)
-
Step 400
400
#9D93E9
oklch(70.6% 0.124 288.1)
-
Step 500
500
#8776E3
oklch(63.1% 0.159 288.1)
-
Step 600
600 (this color)
#6D57CB
oklch(54% 0.173 287.9)
-
Step 700
700
#5F4BB5
oklch(49.1% 0.161 287.6)
-
Step 800
800
#4E3E92
oklch(42.7% 0.133 288.2)
-
Step 900
900
#403675
oklch(37.7% 0.104 287.6)
-
Step 950
950
#252044
oklch(26.9% 0.065 287.6)
#6D57CB 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) | #046DCF | 0.099 |
| Deuteranopia (no green cones) | #0767C9 | 0.098 |
| Tritanopia (no blue cones) | #4F7188 | 0.144 |
| Achromatopsia (no color) | #6A6A6A | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6D57CB
#6D57CB
oklch(54% 0.173 287.9)
- #767300
#767300
oklch(54.1% 0.117 107.9)
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 #6D57CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.008
- Light Indigo #6D5ACF ΔE 0.009
- Iris #6258C4 ΔE 0.020
- Dark Periwinkle #665FD1 ΔE 0.022
- Bluey Purple #6241C7 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.055
- Purpley #8756E4 ΔE 0.057
- Deep Lavender #8D5EB7 ΔE 0.068
Use #6D57CB 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.