#603D8A
Closest named color: Rebecca Purple (#663399). oklch(43.8% 0.125 302.5), rgb(96, 61, 138).
Aa
White text reads best on this color (8.29:1).
About this color
#603D8A is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.125 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.035 away. White text reads best on it, at 8.29:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #603D8A |
| RGB | rgb(96, 61, 138) |
| HSL | hsl(267, 39%, 39%) |
| OKLCH | oklch(43.8% 0.125 302.5) |
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 #603D8A | 8.29:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #603D8A | 2.53:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #603D8A text on white | 8.29:1 | AAA | Lc 88.4 | Fine for body text |
| #603D8A text on black | 2.53:1 | Fails | Lc -13.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DED3F0
oklch(88.5% 0.041 302.8)
-
Step 300
300
#C9B6E8
oklch(80.9% 0.072 302.2)
-
Step 400
400
#AF8EDD
oklch(70.7% 0.118 302.7)
-
Step 500
500
#9C70D3
oklch(63.1% 0.149 302.9)
-
Step 600
600
#8756C0
oklch(55.6% 0.162 302.8)
-
Step 700
700
#7246A6
oklch(49.1% 0.15 302.3)
-
Step 800
800 (this color)
#603D8A
oklch(43.8% 0.125 302.5)
-
Step 900
900
#4C336C
oklch(37.8% 0.097 302.2)
-
Step 950
950
#2C1E3F
oklch(26.9% 0.062 302)
#603D8A 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) | #214E8D | 0.093 |
| Deuteranopia (no green cones) | #2C4E88 | 0.085 |
| Tritanopia (no blue cones) | #584C5D | 0.095 |
| Achromatopsia (no color) | #4E4E4E | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603D8A
#603D8A
oklch(43.8% 0.125 302.5)
- #485B00
#485B00
oklch(43.9% 0.107 122.6)
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 #603D8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.035
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.049
- Twilight #4E518B ΔE 0.057
- Dusk #4E5481 ΔE 0.070
- Light Eggplant #894585 ΔE 0.084
- Dusty Grape #545775 ΔE 0.087
- Denim Blue #3B5B92 ΔE 0.091
Use #603D8A 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.