#5B559B
Closest named color: Twilight (#4E518B). oklch(48.8% 0.11 285.5), rgb(91, 85, 155).
Aa
White text reads best on this color (6.52:1).
About this color
#5B559B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.110 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 6.52:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.21:1 |
| White text | 6.52:1 |
Values
| HEX | #5B559B |
| RGB | rgb(91, 85, 155) |
| HSL | hsl(245, 29%, 47%) |
| OKLCH | oklch(48.8% 0.11 285.5) |
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 #5B559B | 6.52:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #5B559B | 3.21:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #5B559B text on white | 6.52:1 | AA | Lc 82.2 | Fine for body text |
| #5B559B text on black | 3.21:1 | AA large text | Lc -19.7 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D7D7EC
oklch(88.6% 0.029 285.8)
-
Step 300
300
#BDBCE2
oklch(80.9% 0.053 286.3)
-
Step 400
400
#9B99D4
oklch(70.7% 0.086 285.5)
-
Step 500
500
#837FC8
oklch(63% 0.109 285.3)
-
Step 600
600
#6E67B5
oklch(55.5% 0.119 285.9)
-
Step 700
700 (this color)
#5B559B
oklch(48.8% 0.11 285.5)
-
Step 800
800
#4B467E
oklch(42.6% 0.091 285.9)
-
Step 900
900
#3E3B65
oklch(37.6% 0.071 285.7)
-
Step 950
950
#24233B
oklch(26.9% 0.044 284.9)
#5B559B 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) | #3B609E | 0.048 |
| Deuteranopia (no green cones) | #3A5C99 | 0.046 |
| Tritanopia (no blue cones) | #496370 | 0.094 |
| Achromatopsia (no color) | #5E5E5E | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B559B
#5B559B
oklch(48.8% 0.11 285.5)
- #696300
#696300
oklch(49% 0.104 105.5)
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 #5B559B, closest first.
No curated palette has a color within ΔE 0.04 of #5B559B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusky Blue #475F94 ΔE 0.041
- Dusk #4E5481 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
- Denim #3B638C ΔE 0.064
- French Blue #436BAD ΔE 0.065
- Dusty Grape #545775 ΔE 0.065
- Blueberry #464196 ΔE 0.066
Use #5B559B 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.