#583F78
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.095 302.8), rgb(88, 63, 120).
Aa
White text reads best on this color (8.76:1).
About this color
#583F78 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.095 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 8.76:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #583F78 |
| RGB | rgb(88, 63, 120) |
| HSL | hsl(266, 31%, 36%) |
| OKLCH | oklch(42.1% 0.095 302.8) |
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 #583F78 | 8.76:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #583F78 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #583F78 text on white | 8.76:1 | AAA | Lc 89.9 | Fine for body text |
| #583F78 text on black | 2.39:1 | Fails | Lc -12.4 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DDD5EB
oklch(88.6% 0.031 302.3)
-
Step 300
300
#C7B9DF
oklch(81% 0.055 302)
-
Step 400
400
#AB93CF
oklch(70.6% 0.09 302.5)
-
Step 500
500
#9778C2
oklch(63.1% 0.113 302.6)
-
Step 600
600
#825FAF
oklch(55.6% 0.125 302.7)
-
Step 700
700
#6E4E96
oklch(49% 0.116 302.9)
-
Step 800
800 (this color)
#583F78
oklch(42.1% 0.095 302.8)
-
Step 900
900
#493762
oklch(37.6% 0.074 302.3)
-
Step 950
950
#2B2039
oklch(26.9% 0.047 303.6)
#583F78 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) | #2F4A7A | 0.066 |
| Deuteranopia (no green cones) | #354B77 | 0.061 |
| Tritanopia (no blue cones) | #524955 | 0.074 |
| Achromatopsia (no color) | #4B4B4B | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #583F78
#583F78
oklch(42.1% 0.095 302.8)
- #44550D
#44550D
oklch(42.1% 0.095 122.6)
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 #583F78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Twilight #4E518B ΔE 0.054
- Blueberry #464196 ΔE 0.058
- Dusk #4E5481 ΔE 0.058
- Rebecca Purple #663399 ΔE 0.068
- Dusty Grape #545775 ΔE 0.070
- YInMn Blue #415A77 ΔE 0.083
- Dusk Blue #26538D ΔE 0.084
Use #583F78 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.