#583C99
Closest named color: Rebecca Purple (#663399). oklch(43.8% 0.145 293.4), rgb(88, 60, 153).
Aa
White text reads best on this color (8.32:1).
About this color
#583C99 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.145 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.031 away. White text reads best on it, at 8.32:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #583C99 |
| RGB | rgb(88, 60, 153) |
| HSL | hsl(258, 44%, 42%) |
| OKLCH | oklch(43.8% 0.145 293.4) |
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 #583C99 | 8.32:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #583C99 | 2.52:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #583C99 text on white | 8.32:1 | AAA | Lc 88.4 | Fine for body text |
| #583C99 text on black | 2.52:1 | Fails | Lc -13.8 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F6
oklch(88.5% 0.047 293.5)
-
Step 300
300
#C2B7F3
oklch(80.9% 0.084 292.8)
-
Step 400
400
#A58FED
oklch(70.8% 0.136 293.4)
-
Step 500
500
#9070E7
oklch(63.1% 0.173 293.2)
-
Step 600
600
#7C54D5
oklch(55.6% 0.189 293.6)
-
Step 700
700
#6944B9
oklch(49.2% 0.176 293.5)
-
Step 800
800 (this color)
#583C99
oklch(43.8% 0.145 293.4)
-
Step 900
900
#463277
oklch(37.7% 0.113 293.6)
-
Step 950
950
#291E46
oklch(27.1% 0.072 293.7)
#583C99 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) | #004F9C | 0.095 |
| Deuteranopia (no green cones) | #074C97 | 0.093 |
| Tritanopia (no blue cones) | #465164 | 0.118 |
| Achromatopsia (no color) | #4E4E4E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #583C99
#583C99
oklch(43.8% 0.145 293.4)
- #525700
#525700
oklch(43.7% 0.098 113.6)
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 #583C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.031
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.036
- Twilight #4E518B ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
- Bluey Purple #6241C7 ΔE 0.076
- Chrysanthemum #560BAD ΔE 0.078
- Dusk #4E5481 ΔE 0.081
Use #583C99 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.