#5B57BD
Closest named color: Iris (#6258C4). oklch(51.5% 0.156 281.2), rgb(91, 87, 189).
Aa
White text reads best on this color (5.92:1).
About this color
#5B57BD is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.156 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.016 away. White text reads best on it, at 5.92:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #5B57BD |
| RGB | rgb(91, 87, 189) |
| HSL | hsl(242, 44%, 54%) |
| OKLCH | oklch(51.5% 0.156 281.2) |
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 #5B57BD | 5.92:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #5B57BD | 3.54:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #5B57BD text on white | 5.92:1 | AA | Lc 79.4 | Fine for body text |
| #5B57BD text on black | 3.54:1 | AA large text | Lc -22.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F9
oklch(93.7% 0.022 280.3)
-
Step 200
200
#D4D7F5
oklch(88.6% 0.041 281)
-
Step 300
300
#B8BCF1
oklch(81% 0.075 281.2)
-
Step 400
400
#9497EA
oklch(70.7% 0.121 281.3)
-
Step 500
500
#7B7BE3
oklch(63.1% 0.153 281.1)
-
Step 600
600
#6661D1
oklch(55.6% 0.168 281.5)
-
Step 700
700 (this color)
#5B57BD
oklch(51.5% 0.156 281.2)
-
Step 800
800
#454293
oklch(42.7% 0.129 281.1)
-
Step 900
900
#3A3975
oklch(37.8% 0.1 281.2)
-
Step 950
950
#222244
oklch(27.1% 0.062 281.4)
#5B57BD 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) | #1D68C1 | 0.069 |
| Deuteranopia (no green cones) | #0E60BB | 0.072 |
| Tritanopia (no blue cones) | #336E81 | 0.135 |
| Achromatopsia (no color) | #646464 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B57BD
#5B57BD
oklch(51.5% 0.156 281.2)
- #756900
#756900
oklch(51.6% 0.108 101.5)
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 #5B57BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.016
- Slate Blue #6A5ACD ΔE 0.035
- Dark Periwinkle #665FD1 ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.040
- Warm Blue #4B57DB ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- French Blue #436BAD ΔE 0.066
Use #5B57BD 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.