#603578
Closest named color: Dark Slate Blue (#483D8B). oklch(41.3% 0.116 312), rgb(96, 53, 120).
Aa
White text reads best on this color (9.21:1).
About this color
#603578 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.116 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 0.055 away. White text reads best on it, at 9.21:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #603578 |
| RGB | rgb(96, 53, 120) |
| HSL | hsl(279, 39%, 34%) |
| OKLCH | oklch(41.3% 0.116 312) |
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 #603578 | 9.21:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #603578 | 2.27:1 | Fails | Lc 13.0 | Not readable |
| #603578 text on white | 9.21:1 | AAA | Lc 90.9 | Preferred for body text |
| #603578 text on black | 2.27:1 | Fails | Lc -11.4 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE6F4
oklch(93.5% 0.021 311.1)
-
Step 200
200
#E2D2EC
oklch(88.5% 0.039 312.6)
-
Step 300
300
#CFB5E1
oklch(81% 0.067 311.4)
-
Step 400
400
#B78DD2
oklch(70.8% 0.108 311.6)
-
Step 500
500
#A56EC6
oklch(63% 0.14 311.7)
-
Step 600
600
#9055B2
oklch(55.6% 0.15 311.8)
-
Step 700
700
#7B4499
oklch(49% 0.141 312.2)
-
Step 800
800 (this color)
#603578
oklch(41.3% 0.116 312)
-
Step 900
900
#513264
oklch(37.7% 0.09 311.4)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#603578 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) | #23457A | 0.099 |
| Deuteranopia (no green cones) | #314876 | 0.088 |
| Tritanopia (no blue cones) | #5D4051 | 0.079 |
| Achromatopsia (no color) | #474747 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603578
#603578
oklch(41.3% 0.116 312)
- #325700
#325700
oklch(41.3% 0.115 132.1)
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 #603578, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Rebecca Purple #663399 ΔE 0.056
- Blueberry #464196 ΔE 0.070
- Twilight #4E518B ΔE 0.078
- Dusk #4E5481 ΔE 0.084
- Grape Purple #5D1451 ΔE 0.088
- Purple #800080 ΔE 0.089
- Rich Purple #720058 ΔE 0.092
Use #603578 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.