#603B99
Closest named color: Rebecca Purple (#663399). oklch(44.5% 0.148 298.3), rgb(96, 59, 153).
Aa
White text reads best on this color (8.13:1).
About this color
#603B99 is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.148 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 0.019 away. White text reads best on it, at 8.13:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #603B99 |
| RGB | rgb(96, 59, 153) |
| HSL | hsl(264, 44%, 42%) |
| OKLCH | oklch(44.5% 0.148 298.3) |
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 #603B99 | 8.13:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #603B99 | 2.58:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #603B99 text on white | 8.13:1 | AAA | Lc 87.7 | Fine for body text |
| #603B99 text on black | 2.58:1 | Fails | Lc -14.4 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F9
oklch(93.7% 0.025 298.6)
-
Step 200
200
#DDD3F5
oklch(88.5% 0.047 298.9)
-
Step 300
300
#C7B5F1
oklch(80.9% 0.085 298.2)
-
Step 400
400
#AC8CEB
oklch(70.7% 0.139 298.3)
-
Step 500
500
#996CE4
oklch(63.1% 0.176 298.5)
-
Step 600
600
#8450D2
oklch(55.6% 0.192 298.3)
-
Step 700
700
#7040B6
oklch(49.1% 0.178 298.3)
-
Step 800
800 (this color)
#603B99
oklch(44.5% 0.148 298.3)
-
Step 900
900
#4A3075
oklch(37.7% 0.114 298.1)
-
Step 950
950
#2B1D45
oklch(27% 0.073 297.5)
#603B99 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) | #00509C | 0.108 |
| Deuteranopia (no green cones) | #164F97 | 0.101 |
| Tritanopia (no blue cones) | #534F64 | 0.113 |
| Achromatopsia (no color) | #4F4F4F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603B99
#603B99
oklch(44.5% 0.148 298.3)
- #4F5B00
#4F5B00
oklch(44.5% 0.104 118.2)
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 #603B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.019
- Blueberry #464196 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight #4E518B ΔE 0.068
- Bluey Purple #6241C7 ΔE 0.074
- Blue With A Hint Of Purple #533CC6 ΔE 0.076
- Chrysanthemum #560BAD ΔE 0.081
- Grape #7209B7 ΔE 0.083
Use #603B99 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.