#603579
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.117 311.5), rgb(96, 53, 121).
Aa
White text reads best on this color (9.19:1).
About this color
#603579 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.117 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 0.054 away. White text reads best on it, at 9.19:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #603579 |
| RGB | rgb(96, 53, 121) |
| HSL | hsl(278, 39%, 34%) |
| OKLCH | oklch(41.4% 0.117 311.5) |
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 #603579 | 9.19:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #603579 | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #603579 text on white | 9.19:1 | AAA | Lc 90.9 | Preferred for body text |
| #603579 text on black | 2.28:1 | 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
#E1D2EC
oklch(88.4% 0.039 311.1)
-
Step 300
300
#CFB5E1
oklch(81% 0.067 311.4)
-
Step 400
400
#B78CD3
oklch(70.6% 0.111 311.4)
-
Step 500
500
#A56EC7
oklch(63.1% 0.141 311.4)
-
Step 600
600
#9054B3
oklch(55.5% 0.153 311.6)
-
Step 700
700
#7B449A
oklch(49.1% 0.142 311.8)
-
Step 800
800 (this color)
#603579
oklch(41.4% 0.117 311.5)
-
Step 900
900
#513265
oklch(37.8% 0.091 310.8)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#603579 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) | #22457B | 0.100 |
| Deuteranopia (no green cones) | #304977 | 0.090 |
| Tritanopia (no blue cones) | #5D4151 | 0.082 |
| Achromatopsia (no color) | #484848 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603579
#603579
oklch(41.4% 0.117 311.5)
- #335700
#335700
oklch(41.3% 0.114 131.7)
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 #603579, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Rebecca Purple #663399 ΔE 0.054
- Blueberry #464196 ΔE 0.069
- Twilight #4E518B ΔE 0.077
- Dusk #4E5481 ΔE 0.084
- Purple #800080 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.089
- Rich Purple #720058 ΔE 0.093
Use #603579 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.