#5B57A6
Closest named color: Dusky Blue (#475F94). oklch(49.9% 0.123 283.3), rgb(91, 87, 166).
Aa
White text reads best on this color (6.25:1).
About this color
#5B57A6 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.123 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.048 away. White text reads best on it, at 6.25:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #5B57A6 |
| RGB | rgb(91, 87, 166) |
| HSL | hsl(243, 31%, 50%) |
| OKLCH | oklch(49.9% 0.123 283.3) |
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 #5B57A6 | 6.25:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #5B57A6 | 3.35:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #5B57A6 text on white | 6.25:1 | AA | Lc 81.0 | Fine for body text |
| #5B57A6 text on black | 3.35:1 | AA large text | Lc -20.9 | 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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D6D7EF
oklch(88.6% 0.033 283.8)
-
Step 300
300
#BBBCE7
oklch(80.9% 0.06 283.9)
-
Step 400
400
#9899DA
oklch(70.7% 0.094 283)
-
Step 500
500
#807ED0
oklch(63% 0.122 283.4)
-
Step 600
600
#6A66BD
oklch(55.5% 0.132 283.3)
-
Step 700
700 (this color)
#5B57A6
oklch(49.9% 0.123 283.3)
-
Step 800
800
#484684
oklch(42.7% 0.101 282.7)
-
Step 900
900
#3C3B6A
oklch(37.7% 0.079 282.9)
-
Step 950
950
#23233E
oklch(27% 0.05 282.6)
#5B57A6 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) | #3763A9 | 0.051 |
| Deuteranopia (no green cones) | #335EA4 | 0.052 |
| Tritanopia (no blue cones) | #436776 | 0.105 |
| Achromatopsia (no color) | #606060 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B57A6
#5B57A6
oklch(49.9% 0.123 283.3)
- #6E6500
#6E6500
oklch(49.9% 0.105 103.4)
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 #5B57A6, closest first.
No curated palette has a color within ΔE 0.04 of #5B57A6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.048
- Iris #6258C4 ΔE 0.049
- Twilight #4E518B ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.056
- French Blue #436BAD ΔE 0.058
- Dusk #4E5481 ΔE 0.064
- Slate Blue #6A5ACD ΔE 0.066
- Mid Blue #276AB3 ΔE 0.070
Use #5B57A6 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.