#5A3370
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.107 312), rgb(90, 51, 112).
Aa
White text reads best on this color (9.80:1).
About this color
#5A3370 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.107 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 9.80:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.80:1 |
Values
| HEX | #5A3370 |
| RGB | rgb(90, 51, 112) |
| HSL | hsl(278, 37%, 32%) |
| OKLCH | oklch(39.7% 0.107 312) |
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 #5A3370 | 9.80:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #5A3370 | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #5A3370 text on white | 9.80:1 | AAA | Lc 92.5 | Preferred for body text |
| #5A3370 text on black | 2.14:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E3D1EF
oklch(88.4% 0.045 312)
-
Step 300
300
#D2B2E7
oklch(80.9% 0.081 311.8)
-
Step 400
400
#BB88DA
oklch(70.6% 0.128 311.9)
-
Step 500
500
#AA68D0
oklch(63.1% 0.163 311.9)
-
Step 600
600
#964CBD
oklch(55.7% 0.179 312.2)
-
Step 700
700
#7F3CA3
oklch(49% 0.166 311.8)
-
Step 800
800
#683384
oklch(42.8% 0.137 312.2)
-
Step 900
900 (this color)
#5A3370
oklch(39.7% 0.107 312)
-
Step 950
950
#311B3E
oklch(26.9% 0.068 311.6)
#5A3370 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) | #234272 | 0.091 |
| Deuteranopia (no green cones) | #30446E | 0.080 |
| Tritanopia (no blue cones) | #583D4C | 0.074 |
| Achromatopsia (no color) | #444444 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3370
#5A3370
oklch(39.7% 0.107 312)
- #305204
#305204
oklch(39.7% 0.107 131.9)
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 #5A3370, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Rebecca Purple #663399 ΔE 0.071
- Blueberry #464196 ΔE 0.075
- Grape Purple #5D1451 ΔE 0.076
- Twilight #4E518B ΔE 0.085
- Dusk #4E5481 ΔE 0.089
- Rich Purple #720058 ΔE 0.089
- Velvet #750851 ΔE 0.091
Use #5A3370 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.