#5B437A
Closest named color: Twilight (#4E518B). oklch(43.4% 0.092 302.9), rgb(91, 67, 122).
Aa
White text reads best on this color (8.30:1).
About this color
#5B437A is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.092 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.045 away. White text reads best on it, at 8.30:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #5B437A |
| RGB | rgb(91, 67, 122) |
| HSL | hsl(266, 29%, 37%) |
| OKLCH | oklch(43.4% 0.092 302.9) |
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 #5B437A | 8.30:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #5B437A | 2.52:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #5B437A text on white | 8.30:1 | AAA | Lc 88.6 | Fine for body text |
| #5B437A text on black | 2.52:1 | Fails | Lc -13.6 | Not readable |
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 800.
-
Step 50
50
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F3
oklch(93.7% 0.015 302.5)
-
Step 200
200
#DDD5EA
oklch(88.6% 0.03 303)
-
Step 300
300
#C7B9DE
oklch(80.9% 0.054 302.4)
-
Step 400
400
#AB94CD
oklch(70.7% 0.085 302.8)
-
Step 500
500
#9778C0
oklch(63% 0.11 303.2)
-
Step 600
600
#8260AC
oklch(55.6% 0.119 303.4)
-
Step 700
700
#6E4F94
oklch(49.1% 0.111 303.3)
-
Step 800
800 (this color)
#5B437A
oklch(43.4% 0.092 302.9)
-
Step 900
900
#493861
oklch(37.8% 0.071 302.2)
-
Step 950
950
#2B2139
oklch(27.1% 0.045 302.6)
#5B437A 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) | #354E7C | 0.062 |
| Deuteranopia (no green cones) | #3A4E79 | 0.058 |
| Tritanopia (no blue cones) | #564C58 | 0.070 |
| Achromatopsia (no color) | #4E4E4E | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B437A
#5B437A
oklch(43.4% 0.092 302.9)
- #475917
#475917
oklch(43.4% 0.092 123.5)
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 #5B437A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.045
- Dusk #4E5481 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.060
- Dusty Grape #545775 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.069
- YInMn Blue #415A77 ΔE 0.075
- Denim Blue #3B5B92 ΔE 0.079
Use #5B437A 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.