#5B5B87
Closest named color: Dusk (#4E5481). oklch(49% 0.07 283.5), rgb(91, 91, 135).
Aa
White text reads best on this color (6.38:1).
About this color
#5B5B87 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.070 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.030 away. White text reads best on it, at 6.38:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.29:1 |
| White text | 6.38:1 |
Values
| HEX | #5B5B87 |
| RGB | rgb(91, 91, 135) |
| HSL | hsl(240, 19%, 44%) |
| OKLCH | oklch(49% 0.07 283.5) |
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 #5B5B87 | 6.38:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #5B5B87 | 3.29:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #5B5B87 text on white | 6.38:1 | AA | Lc 81.7 | Fine for body text |
| #5B5B87 text on black | 3.29:1 | AA large text | Lc -20.2 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D7D8E6
oklch(88.6% 0.019 282.7)
-
Step 300
300
#BDBED6
oklch(80.8% 0.034 283.7)
-
Step 400
400
#9C9DC2
oklch(70.8% 0.054 283.7)
-
Step 500
500
#8484B3
oklch(63.1% 0.07 284.2)
-
Step 600
600
#6D6D9E
oklch(55.5% 0.076 283.7)
-
Step 700
700 (this color)
#5B5B87
oklch(49% 0.07 283.5)
-
Step 800
800
#4B4B6E
oklch(42.8% 0.058 283.7)
-
Step 900
900
#3E3E59
oklch(37.6% 0.046 284)
-
Step 950
950
#242534
oklch(27% 0.028 281.4)
#5B5B87 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) | #4E6189 | 0.023 |
| Deuteranopia (no green cones) | #4C5E86 | 0.023 |
| Tritanopia (no blue cones) | #50636B | 0.060 |
| Achromatopsia (no color) | #5F5F5F | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5B87
#5B5B87
oklch(49% 0.07 283.5)
- #676231
#676231
oklch(48.9% 0.069 103.4)
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 #5B5B87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.030
- Dusty Grape #545775 ΔE 0.032
- Dusky Blue #475F94 ΔE 0.033
- Twilight #4E518B ΔE 0.039
- Denim #3B638C ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.047
- Slate #516572 ΔE 0.054
Use #5B5B87 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.