#57559B
Closest named color: Twilight (#4E518B). oklch(48.5% 0.11 282.8), rgb(87, 85, 155).
Aa
White text reads best on this color (6.60:1).
About this color
#57559B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.110 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 6.60:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.17:1 |
| White text | 6.60:1 |
Values
| HEX | #57559B |
| RGB | rgb(87, 85, 155) |
| HSL | hsl(242, 29%, 47%) |
| OKLCH | oklch(48.5% 0.11 282.8) |
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 #57559B | 6.60:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #57559B | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #57559B text on white | 6.60:1 | AA | Lc 82.6 | Fine for body text |
| #57559B text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BBBDE3
oklch(80.9% 0.053 282.8)
-
Step 400
400
#989AD5
oklch(70.7% 0.086 282.5)
-
Step 500
500
#8080C9
oklch(63% 0.109 282.8)
-
Step 600
600
#6A69B6
oklch(55.7% 0.118 282.5)
-
Step 700
700 (this color)
#57559B
oklch(48.5% 0.11 282.8)
-
Step 800
800
#48477F
oklch(42.6% 0.091 282.6)
-
Step 900
900
#3C3C66
oklch(37.7% 0.071 282.4)
-
Step 950
950
#23233C
oklch(26.9% 0.046 282.9)
#57559B 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) | #3A5F9E | 0.043 |
| Deuteranopia (no green cones) | #375A99 | 0.043 |
| Tritanopia (no blue cones) | #426370 | 0.095 |
| Achromatopsia (no color) | #5D5D5D | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57559B
#57559B
oklch(48.5% 0.11 282.8)
- #6A6100
#6A6100
oklch(48.6% 0.102 103.2)
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 #57559B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusky Blue #475F94 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.044
- Dusk #4E5481 ΔE 0.045
- Denim #3B638C ΔE 0.061
- Blueberry #464196 ΔE 0.062
- French Blue #436BAD ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.064
Use #57559B 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.