#603C9B
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.149 297.5), rgb(96, 60, 155).
Aa
White text reads best on this color (8.02:1).
About this color
#603C9B is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.149 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.021 away. White text reads best on it, at 8.02:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.61:1 |
| White text | 8.02:1 |
Values
| HEX | #603C9B |
| RGB | rgb(96, 60, 155) |
| HSL | hsl(263, 44%, 42%) |
| OKLCH | oklch(44.8% 0.149 297.5) |
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 #603C9B | 8.02:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #603C9B | 2.61:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #603C9B text on white | 8.02:1 | AAA | Lc 87.4 | Fine for body text |
| #603C9B text on black | 2.61:1 | Fails | Lc -14.7 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DCD3F6
oklch(88.5% 0.049 297.2)
-
Step 300
300
#C7B5F2
oklch(80.9% 0.087 298)
-
Step 400
400
#AB8CEC
oklch(70.7% 0.14 297.6)
-
Step 500
500
#976CE5
oklch(63% 0.177 297.5)
-
Step 600
600
#8350D3
oklch(55.5% 0.193 297.7)
-
Step 700
700
#6F40B7
oklch(49.1% 0.179 297.5)
-
Step 800
800 (this color)
#603C9B
oklch(44.8% 0.149 297.5)
-
Step 900
900
#4A3076
oklch(37.7% 0.116 297.7)
-
Step 950
950
#2B1D45
oklch(27% 0.073 297.5)
#603C9B 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) | #00519E | 0.107 |
| Deuteranopia (no green cones) | #144F99 | 0.101 |
| Tritanopia (no blue cones) | #525165 | 0.117 |
| Achromatopsia (no color) | #505050 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603C9B
#603C9B
oklch(44.8% 0.149 297.5)
- #515C00
#515C00
oklch(44.9% 0.104 117.5)
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 #603C9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.021
- Blueberry #464196 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight #4E518B ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.071
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
- Chrysanthemum #560BAD ΔE 0.081
- Blurple #5539CC ΔE 0.082
Use #603C9B 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.