#603B73
Closest named color: Dark Slate Blue (#483D8B). oklch(42% 0.099 313.3), rgb(96, 59, 115).
Aa
White text reads best on this color (8.85:1).
About this color
#603B73 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.099 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.059 away. White text reads best on it, at 8.85:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #603B73 |
| RGB | rgb(96, 59, 115) |
| HSL | hsl(280, 32%, 34%) |
| OKLCH | oklch(42% 0.099 313.3) |
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 #603B73 | 8.85:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #603B73 | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #603B73 text on white | 8.85:1 | AAA | Lc 90.1 | Preferred for body text |
| #603B73 text on black | 2.37:1 | Fails | Lc -12.2 | 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 800.
-
Step 50
50
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EEE7F2
oklch(93.7% 0.016 313.6)
-
Step 200
200
#E1D3E9
oklch(88.5% 0.033 313.5)
-
Step 300
300
#CEB6DC
oklch(80.9% 0.059 313.1)
-
Step 400
400
#B590CA
oklch(70.8% 0.092 313)
-
Step 500
500
#A373BC
oklch(63.2% 0.118 313.5)
-
Step 600
600
#8E5AA8
oklch(55.6% 0.129 313.6)
-
Step 700
700
#784A90
oklch(49.1% 0.119 313.1)
-
Step 800
800 (this color)
#603B73
oklch(42% 0.099 313.3)
-
Step 900
900
#50345E
oklch(37.6% 0.077 313.7)
-
Step 950
950
#2F1F37
oklch(27% 0.048 313.9)
#603B73 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) | #2F4875 | 0.082 |
| Deuteranopia (no green cones) | #394B71 | 0.075 |
| Tritanopia (no blue cones) | #5E4351 | 0.068 |
| Achromatopsia (no color) | #4A4A4A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603B73
#603B73
oklch(42% 0.099 313.3)
- #365819
#365819
oklch(42% 0.099 133.4)
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 #603B73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.059
- Rebecca Purple #663399 ΔE 0.068
- Twilight #4E518B ΔE 0.068
- Dusk #4E5481 ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Dusty Grape #545775 ΔE 0.079
- Brownish Purple #76424E ΔE 0.083
- Purple Brown #673A3F ΔE 0.088
Use #603B73 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.