#5B3677
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.111 308.6), rgb(91, 54, 119).
Aa
White text reads best on this color (9.37:1).
About this color
#5B3677 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.111 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 9.37:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.37:1 |
Values
| HEX | #5B3677 |
| RGB | rgb(91, 54, 119) |
| HSL | hsl(274, 38%, 34%) |
| OKLCH | oklch(40.8% 0.111 308.6) |
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 #5B3677 | 9.37:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #5B3677 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #5B3677 text on white | 9.37:1 | AAA | Lc 91.4 | Preferred for body text |
| #5B3677 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#E0D3EC
oklch(88.5% 0.037 308.8)
-
Step 300
300
#CDB6E1
oklch(81% 0.064 309.1)
-
Step 400
400
#B38FD2
oklch(70.7% 0.103 308.5)
-
Step 500
500
#A071C6
oklch(63% 0.133 308.5)
-
Step 600
600
#8B58B3
oklch(55.6% 0.144 308.3)
-
Step 700
700
#76489A
oklch(49.1% 0.133 308.1)
-
Step 800
800 (this color)
#5B3677
oklch(40.8% 0.111 308.6)
-
Step 900
900
#4F3364
oklch(37.7% 0.087 309.2)
-
Step 950
950
#2E1E3B
oklch(26.9% 0.056 308.5)
#5B3677 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) | #234579 | 0.090 |
| Deuteranopia (no green cones) | #2F4775 | 0.081 |
| Tritanopia (no blue cones) | #574151 | 0.079 |
| Achromatopsia (no color) | #464646 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3677
#5B3677
oklch(40.8% 0.111 308.6)
- #385400
#385400
oklch(40.8% 0.107 128.4)
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 #5B3677, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Rebecca Purple #663399 ΔE 0.060
- Blueberry #464196 ΔE 0.065
- Twilight #4E518B ΔE 0.074
- Dusk #4E5481 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.088
- Dusty Grape #545775 ΔE 0.093
- Rich Purple #720058 ΔE 0.097
Use #5B3677 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.