#5B5399
Closest named color: Twilight (#4E518B). oklch(48.3% 0.11 286.8), rgb(91, 83, 153).
Aa
White text reads best on this color (6.68:1).
About this color
#5B5399 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.110 and its hue 287°. 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 6.68:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.14:1 |
| White text | 6.68:1 |
Values
| HEX | #5B5399 |
| RGB | rgb(91, 83, 153) |
| HSL | hsl(247, 30%, 46%) |
| OKLCH | oklch(48.3% 0.11 286.8) |
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 #5B5399 | 6.68:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #5B5399 | 3.14:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #5B5399 text on white | 6.68:1 | AA | Lc 82.9 | Fine for body text |
| #5B5399 text on black | 3.14:1 | AA large text | Lc -19.1 | 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
#E9E9F4
oklch(93.7% 0.015 286.1)
-
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
#9C99D4
oklch(70.7% 0.086 286.3)
-
Step 500
500
#857FC8
oklch(63.2% 0.108 286.6)
-
Step 600
600
#6F67B5
oklch(55.6% 0.119 286.6)
-
Step 700
700 (this color)
#5B5399
oklch(48.3% 0.11 286.8)
-
Step 800
800
#4C467E
oklch(42.7% 0.091 286.8)
-
Step 900
900
#3F3B65
oklch(37.6% 0.071 286.8)
-
Step 950
950
#25233B
oklch(27% 0.044 286.9)
#5B5399 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) | #3A5E9C | 0.050 |
| Deuteranopia (no green cones) | #395A97 | 0.048 |
| Tritanopia (no blue cones) | #4A616E | 0.094 |
| Achromatopsia (no color) | #5C5C5C | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5399
#5B5399
oklch(48.3% 0.11 286.8)
- #666200
#666200
oklch(48.4% 0.104 106.9)
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 #5B5399, 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 0.043
- Dusk #4E5481 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.049
- Blueberry #464196 ΔE 0.061
- Dusty Grape #545775 ΔE 0.064
- Denim #3B638C ΔE 0.066
- Light Navy Blue #2E5A88 ΔE 0.068
Use #5B5399 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.