#5B397C
Closest named color: Dark Slate Blue (#483D8B). oklch(41.6% 0.112 305.5), rgb(91, 57, 124).
Aa
White text reads best on this color (9.04:1).
About this color
#5B397C is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.112 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 0.042 away. White text reads best on it, at 9.04:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #5B397C |
| RGB | rgb(91, 57, 124) |
| HSL | hsl(270, 37%, 35%) |
| OKLCH | oklch(41.6% 0.112 305.5) |
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 #5B397C | 9.04:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #5B397C | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #5B397C text on white | 9.04:1 | AAA | Lc 90.5 | Preferred for body text |
| #5B397C text on black | 2.32:1 | Fails | Lc -11.8 | 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
#B08FD5
oklch(70.6% 0.106 305.5)
-
Step 500
500
#9D72CA
oklch(63.1% 0.135 305.4)
-
Step 600
600
#8859B6
oklch(55.6% 0.145 305.5)
-
Step 700
700
#73489D
oklch(49% 0.136 305.3)
-
Step 800
800 (this color)
#5B397C
oklch(41.6% 0.112 305.5)
-
Step 900
900
#4D3466
oklch(37.7% 0.087 305.7)
-
Step 950
950
#2D1F3C
oklch(27.1% 0.055 305.3)
#5B397C 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) | #24487E | 0.086 |
| Deuteranopia (no green cones) | #2E497A | 0.079 |
| Tritanopia (no blue cones) | #564555 | 0.082 |
| Achromatopsia (no color) | #494949 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B397C
#5B397C
oklch(41.6% 0.112 305.5)
- #3E5500
#3E5500
oklch(41.5% 0.105 125.6)
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 #5B397C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Rebecca Purple #663399 ΔE 0.054
- Blueberry #464196 ΔE 0.057
- Twilight #4E518B ΔE 0.066
- Dusk #4E5481 ΔE 0.074
- Dusty Grape #545775 ΔE 0.087
- Cobalt #1E488F ΔE 0.093
- Dusk Blue #26538D ΔE 0.096
Use #5B397C 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.