#5B57AD
Closest named color: Iris (#6258C4). oklch(50.4% 0.133 282.6), rgb(91, 87, 173).
Aa
White text reads best on this color (6.15:1).
About this color
#5B57AD is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.133 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.038 away. White text reads best on it, at 6.15:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.41:1 |
| White text | 6.15:1 |
Values
| HEX | #5B57AD |
| RGB | rgb(91, 87, 173) |
| HSL | hsl(243, 34%, 51%) |
| OKLCH | oklch(50.4% 0.133 282.6) |
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 #5B57AD | 6.15:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #5B57AD | 3.41:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #5B57AD text on white | 6.15:1 | AA | Lc 80.5 | Fine for body text |
| #5B57AD text on black | 3.41:1 | AA large text | Lc -21.3 | 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
#E8E9F6
oklch(93.7% 0.018 282.5)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#BABCEA
oklch(80.9% 0.065 282.9)
-
Step 400
400
#9798DF
oklch(70.6% 0.103 282.8)
-
Step 500
500
#7F7DD6
oklch(63.1% 0.132 283)
-
Step 600
600
#6965C3
oklch(55.6% 0.142 282.7)
-
Step 700
700 (this color)
#5B57AD
oklch(50.4% 0.133 282.6)
-
Step 800
800
#474589
oklch(42.8% 0.11 282)
-
Step 900
900
#3C3A6D
oklch(37.7% 0.086 283.3)
-
Step 950
950
#232240
oklch(26.9% 0.055 283.6)
#5B57AD 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) | #3164B0 | 0.056 |
| Deuteranopia (no green cones) | #2C5FAB | 0.057 |
| Tritanopia (no blue cones) | #3F697A | 0.113 |
| Achromatopsia (no color) | #616161 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B57AD
#5B57AD
oklch(50.4% 0.133 282.6)
- #706600
#706600
oklch(50.4% 0.106 102.8)
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 #5B57AD, closest first.
No curated palette has a color within ΔE 0.04 of #5B57AD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.056
- Dusky Blue #475F94 ΔE 0.056
- French Blue #436BAD ΔE 0.058
- Twilight #4E518B ΔE 0.059
- Light Indigo #6D5ACF ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.064
Use #5B57AD 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.