#583378
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.116 306.6), rgb(88, 51, 120).
Aa
White text reads best on this color (9.72:1).
About this color
#583378 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.116 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 9.72:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #583378 |
| RGB | rgb(88, 51, 120) |
| HSL | hsl(272, 40%, 34%) |
| OKLCH | oklch(40% 0.116 306.6) |
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 #583378 | 9.72:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #583378 | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #583378 text on white | 9.72:1 | AAA | Lc 92.2 | Preferred for body text |
| #583378 text on black | 2.15:1 | Fails | Lc -10.2 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EEE6F8
oklch(93.6% 0.025 305.8)
-
Step 200
200
#E1D1F3
oklch(88.4% 0.049 306.6)
-
Step 300
300
#CFB2ED
oklch(80.8% 0.087 306.9)
-
Step 400
400
#B788E5
oklch(70.8% 0.14 306.4)
-
Step 500
500
#A566DD
oklch(63% 0.18 306.4)
-
Step 600
600
#914ACA
oklch(55.6% 0.194 306.7)
-
Step 700
700
#7B3AAF
oklch(49.1% 0.18 306.3)
-
Step 800
800
#64318E
oklch(42.7% 0.15 306.3)
-
Step 900
900 (this color)
#583378
oklch(40% 0.116 306.6)
-
Step 950
950
#301B42
oklch(27% 0.073 307)
#583378 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) | #1B437A | 0.094 |
| Deuteranopia (no green cones) | #284476 | 0.084 |
| Tritanopia (no blue cones) | #534050 | 0.085 |
| Achromatopsia (no color) | #444444 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #583378
#583378
oklch(40% 0.116 306.6)
- #395100
#395100
oklch(40% 0.103 126.7)
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 #583378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Rebecca Purple #663399 ΔE 0.060
- Blueberry #464196 ΔE 0.064
- Twilight #4E518B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.085
- Dusk #4E5481 ΔE 0.088
- Indigo #4B0082 ΔE 0.088
- Royal Purple #4B006E ΔE 0.093
Use #583378 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.