#6A57CB
Closest named color: Slate Blue (#6A5ACD). oklch(53.7% 0.173 286.6), rgb(106, 87, 203).
Aa
White text reads best on this color (5.47:1).
About this color
#6A57CB is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.173 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.007 away. White text reads best on it, at 5.47:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.83:1 |
| White text | 5.47:1 |
Values
| HEX | #6A57CB |
| RGB | rgb(106, 87, 203) |
| HSL | hsl(250, 53%, 57%) |
| OKLCH | oklch(53.7% 0.173 286.6) |
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 #6A57CB | 5.47:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #6A57CB | 3.83:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #6A57CB text on white | 5.47:1 | AA | Lc 77.0 | Fine for body text |
| #6A57CB text on black | 3.83:1 | AA large text | Lc -24.8 | 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
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D6F5
oklch(88.6% 0.042 285.5)
-
Step 300
300
#BCBAF1
oklch(80.9% 0.077 286.2)
-
Step 400
400
#9B94EA
oklch(70.7% 0.124 286.5)
-
Step 500
500
#8477E4
oklch(63.1% 0.159 286.4)
-
Step 600
600 (this color)
#6A57CB
oklch(53.7% 0.173 286.6)
-
Step 700
700
#5D4CB5
oklch(49.1% 0.16 286.4)
-
Step 800
800
#4C3F93
oklch(42.8% 0.133 286.4)
-
Step 900
900
#3F3675
oklch(37.7% 0.104 286.8)
-
Step 950
950
#252045
oklch(27% 0.067 287.2)
#6A57CB 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) | #006CCF | 0.096 |
| Deuteranopia (no green cones) | #0066C9 | 0.095 |
| Tritanopia (no blue cones) | #497188 | 0.145 |
| Achromatopsia (no color) | #696969 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6A57CB
#6A57CB
oklch(53.7% 0.173 286.6)
- #767100
#767100
oklch(53.6% 0.115 106.6)
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 #6A57CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.007
- Light Indigo #6D5ACF ΔE 0.011
- Iris #6258C4 ΔE 0.017
- Dark Periwinkle #665FD1 ΔE 0.020
- Bluey Purple #6241C7 ΔE 0.051
- Warm Blue #4B57DB ΔE 0.051
- Purpley #8756E4 ΔE 0.061
- Royal Blue #4169E1 ΔE 0.069
Use #6A57CB 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.