#5A3379
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.118 307.7), rgb(90, 51, 121).
Aa
White text reads best on this color (9.61:1).
About this color
#5A3379 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.118 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.047 away. White text reads best on it, at 9.61:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.61:1 |
Values
| HEX | #5A3379 |
| RGB | rgb(90, 51, 121) |
| HSL | hsl(273, 41%, 34%) |
| OKLCH | oklch(40.3% 0.118 307.7) |
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 #5A3379 | 9.61:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #5A3379 | 2.18:1 | Fails | Lc 12.0 | Not readable |
| #5A3379 text on white | 9.61:1 | AAA | Lc 91.9 | Preferred for body text |
| #5A3379 text on black | 2.18:1 | Fails | Lc -10.5 | 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
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#E0D3ED
oklch(88.5% 0.038 308)
-
Step 300
300
#CDB5E4
oklch(80.9% 0.07 308)
-
Step 400
400
#B38ED6
oklch(70.7% 0.11 307.3)
-
Step 500
500
#A170CB
oklch(63.2% 0.141 307.7)
-
Step 600
600
#8C56B8
oklch(55.7% 0.154 307.6)
-
Step 700
700
#77459E
oklch(49% 0.144 307.9)
-
Step 800
800 (this color)
#5A3379
oklch(40.3% 0.118 307.7)
-
Step 900
900
#4F3267
oklch(37.7% 0.093 307.8)
-
Step 950
950
#2E1E3C
oklch(27% 0.058 307.5)
#5A3379 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) | #1B437B | 0.097 |
| Deuteranopia (no green cones) | #294577 | 0.087 |
| Tritanopia (no blue cones) | #554051 | 0.085 |
| Achromatopsia (no color) | #454545 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3379
#5A3379
oklch(40.3% 0.118 307.7)
- #385200
#385200
oklch(40.2% 0.105 127.6)
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 #5A3379, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.047
- Rebecca Purple #663399 ΔE 0.057
- Blueberry #464196 ΔE 0.064
- Twilight #4E518B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.086
- Dusk #4E5481 ΔE 0.088
- Indigo #4B0082 ΔE 0.090
- Purple #800080 ΔE 0.094
Use #5A3379 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.