#603E71
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.091 313.7), rgb(96, 62, 113).
Aa
White text reads best on this color (8.66:1).
About this color
#603E71 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.062 away. White text reads best on it, at 8.66:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #603E71 |
| RGB | rgb(96, 62, 113) |
| HSL | hsl(280, 29%, 34%) |
| OKLCH | oklch(42.5% 0.091 313.7) |
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 #603E71 | 8.66:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #603E71 | 2.42:1 | Fails | Lc 14.4 | Not readable |
| #603E71 text on white | 8.66:1 | AAA | Lc 89.6 | Fine for body text |
| #603E71 text on black | 2.42:1 | Fails | Lc -12.7 | 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
#EEE7F1
oklch(93.6% 0.015 316)
-
Step 200
200
#E0D4E7
oklch(88.5% 0.029 313.3)
-
Step 300
300
#CDB7D9
oklch(80.9% 0.053 313.7)
-
Step 400
400
#B491C6
oklch(70.7% 0.085 314)
-
Step 500
500
#A175B8
oklch(63.1% 0.109 313.5)
-
Step 600
600
#8C5DA3
oklch(55.7% 0.117 313.9)
-
Step 700
700
#774C8C
oklch(49.1% 0.11 313.9)
-
Step 800
800 (this color)
#603E71
oklch(42.5% 0.091 313.7)
-
Step 900
900
#4F365C
oklch(37.8% 0.07 313.5)
-
Step 950
950
#2E2036
oklch(27.1% 0.044 312.7)
#603E71 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) | #344A73 | 0.075 |
| Deuteranopia (no green cones) | #3D4C70 | 0.067 |
| Tritanopia (no blue cones) | #5F4552 | 0.061 |
| Achromatopsia (no color) | #4B4B4B | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603E71
#603E71
oklch(42.5% 0.091 313.7)
- #395921
#395921
oklch(42.5% 0.091 133.8)
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 #603E71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.062
- Twilight #4E518B ΔE 0.064
- Dusk #4E5481 ΔE 0.065
- Dusty Grape #545775 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.074
- Blueberry #464196 ΔE 0.075
- Brownish Purple #76424E ΔE 0.076
- Purple Brown #673A3F ΔE 0.083
Use #603E71 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.