#5B579D
Closest named color: Twilight (#4E518B). oklch(49.4% 0.11 284.2), rgb(91, 87, 157).
Aa
White text reads best on this color (6.37:1).
About this color
#5B579D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.110 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.038 away. White text reads best on it, at 6.37:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.29:1 |
| White text | 6.37:1 |
Values
| HEX | #5B579D |
| RGB | rgb(91, 87, 157) |
| HSL | hsl(243, 29%, 48%) |
| OKLCH | oklch(49.4% 0.11 284.2) |
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 #5B579D | 6.37:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #5B579D | 3.29:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #5B579D text on white | 6.37:1 | AA | Lc 81.6 | Fine for body text |
| #5B579D text on black | 3.29:1 | AA large text | Lc -20.3 | 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
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BCBDE2
oklch(81% 0.052 284)
-
Step 400
400
#9A9AD4
oklch(70.8% 0.084 284)
-
Step 500
500
#8280C9
oklch(63.2% 0.109 284.1)
-
Step 600
600
#6C68B5
oklch(55.6% 0.117 284.3)
-
Step 700
700 (this color)
#5B579D
oklch(49.4% 0.11 284.2)
-
Step 800
800
#4A477F
oklch(42.8% 0.091 284.3)
-
Step 900
900
#3D3C66
oklch(37.7% 0.071 283.5)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#5B579D 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) | #3D61A0 | 0.044 |
| Deuteranopia (no green cones) | #3B5D9B | 0.044 |
| Tritanopia (no blue cones) | #476572 | 0.094 |
| Achromatopsia (no color) | #5F5F5F | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B579D
#5B579D
oklch(49.4% 0.11 284.2)
- #6B6400
#6B6400
oklch(49.4% 0.105 104.8)
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 #5B579D, closest first.
No curated palette has a color within ΔE 0.04 of #5B579D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.038
- Dusky Blue #475F94 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.049
- Dusk #4E5481 ΔE 0.050
- French Blue #436BAD ΔE 0.060
- Denim #3B638C ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Dusty Grape #545775 ΔE 0.067
Use #5B579D 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.