#57558B
Closest named color: Twilight (#4E518B). oklch(47.6% 0.086 284.3), rgb(87, 85, 139).
Aa
White text reads best on this color (6.82:1).
About this color
#57558B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.086 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.019 away. White text reads best on it, at 6.82:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #57558B |
| RGB | rgb(87, 85, 139) |
| HSL | hsl(242, 24%, 44%) |
| OKLCH | oklch(47.6% 0.086 284.3) |
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 #57558B | 6.82:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #57558B | 3.07:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #57558B text on white | 6.82:1 | AA | Lc 83.5 | Fine for body text |
| #57558B text on black | 3.07:1 | AA large text | Lc -18.5 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D7D7E8
oklch(88.4% 0.023 285.9)
-
Step 300
300
#BDBEDB
oklch(81% 0.041 283.9)
-
Step 400
400
#9B9BC9
oklch(70.6% 0.067 284.6)
-
Step 500
500
#8382BB
oklch(63% 0.085 284.5)
-
Step 600
600
#6D6BA8
oklch(55.6% 0.094 284.4)
-
Step 700
700 (this color)
#57558B
oklch(47.6% 0.086 284.3)
-
Step 800
800
#4A4975
oklch(42.6% 0.072 283.9)
-
Step 900
900
#3E3D5E
oklch(37.6% 0.056 284.8)
-
Step 950
950
#242437
oklch(26.9% 0.035 283.8)
#57558B 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) | #445C8D | 0.031 |
| Deuteranopia (no green cones) | #42598A | 0.031 |
| Tritanopia (no blue cones) | #495F69 | 0.074 |
| Achromatopsia (no color) | #5B5B5B | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57558B
#57558B
oklch(47.6% 0.086 284.3)
- #645F1C
#645F1C
oklch(47.6% 0.087 105)
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 #57558B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.019
- Dusk #4E5481 ΔE 0.022
- Dusky Blue #475F94 ΔE 0.034
- Dusty Grape #545775 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.039
- Denim #3B638C ΔE 0.051
- YInMn Blue #415A77 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.053
Use #57558B 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.