#5B387B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.113 306.2), rgb(91, 56, 123).
Aa
White text reads best on this color (9.14:1).
About this color
#5B387B is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.113 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 9.14:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #5B387B |
| RGB | rgb(91, 56, 123) |
| HSL | hsl(271, 37%, 35%) |
| OKLCH | oklch(41.4% 0.113 306.2) |
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 #5B387B | 9.14:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #5B387B | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #5B387B text on white | 9.14:1 | AAA | Lc 90.8 | Preferred for body text |
| #5B387B text on black | 2.29:1 | Fails | Lc -11.5 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F4
oklch(93.6% 0.018 306.7)
-
Step 200
200
#DFD3ED
oklch(88.4% 0.037 306.4)
-
Step 300
300
#CBB6E3
oklch(80.9% 0.066 306.1)
-
Step 400
400
#B18FD5
oklch(70.7% 0.106 306.1)
-
Step 500
500
#9E72C9
oklch(63.1% 0.134 306.2)
-
Step 600
600
#8958B6
oklch(55.5% 0.147 306.3)
-
Step 700
700
#74489D
oklch(49.1% 0.137 305.9)
-
Step 800
800 (this color)
#5B387B
oklch(41.4% 0.113 306.2)
-
Step 900
900
#4D3466
oklch(37.7% 0.087 305.7)
-
Step 950
950
#2D1F3C
oklch(27.1% 0.055 305.3)
#5B387B 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) | #23477D | 0.088 |
| Deuteranopia (no green cones) | #2E4879 | 0.079 |
| Tritanopia (no blue cones) | #564454 | 0.082 |
| Achromatopsia (no color) | #484848 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B387B
#5B387B
oklch(41.4% 0.113 306.2)
- #3D5500
#3D5500
oklch(41.4% 0.106 126.1)
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 #5B387B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Rebecca Purple #663399 ΔE 0.055
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.068
- Dusk #4E5481 ΔE 0.076
- Dusty Grape #545775 ΔE 0.089
- Cobalt #1E488F ΔE 0.094
- Grape Purple #5D1451 ΔE 0.096
Use #5B387B 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.