# Dulux Royal Regatta 4

Source: [https://plan-home.com/color/royal-regatta-4](https://plan-home.com/color/royal-regatta-4)

Dulux Royal Regatta 4 31BB 23/340 is a clear mid-tone blue with a subtle cyan cast, based on its #3F87BC color value. It has a cool, fresh appearance without becoming overly dark, making it a strong option for a bedroom wall, bathroom cabinetry, or a painted front door. In bright daylight, Royal Regatta 4 reads as a clean blue, while warmer indoor lighting can soften its crispness slightly. Pair it with soft white trim, pale grey, light oak, or brushed nickel for a clean-lined look. For more contrast, use it alongside deep navy details or warm terracotta and rust-toned accessories.

## Color details
- **Brand or system:** Dulux
- **Color name:** Royal Regatta 4
- **Color code:** 31BB 23/340
- **HEX:** #3F87BC
- **RGB:** 63, 135, 188
- **Brightness:** Mid-tone
- **Color families:** Blue
- **Temperature:** cool
- **Undertones:** blue

## Color codes
- **HSV:** Hue: 205° Saturation: 66.49% Value: 73.73%
- **HSL:** hsl(205, 50, 49)
- **CMYK:** Cyan: 66.49 Magenta: 28.19 Yellow: 0.0 Key: 26.27
- **YIQ:** Y: 119.514 I: -59.936 Q: 1.263
- **XYZ:** X: 19.787 Y: 22.013 Z: 50.77
- **CIE Lab:** L:54.041 a:-5.567 b:-34.327
- **CIE Luv:** L:54.041 u:-28.29 v:-51.922
- **Decimal:** 4163516
- **Hunter Lab:** 46.918, -6.828, -31.314

## Equivalent and related colors
- [Dulux Blue Seduction 1](https://plan-home.com/color/blue-seduction-1)
- [Dulux Free Dive](https://plan-home.com/color/free-dive)
- [Dulux Venetian Crystal 4](https://plan-home.com/color/venetian-crystal-4)
- [Dulux Azure Sky 1](https://plan-home.com/color/azure-sky-1)
- [Dulux Sea Blue](https://plan-home.com/color/sea-blue)
- [Dulux Electric Storm](https://plan-home.com/color/electric-storm)
- [RAL Classic Light blue](https://plan-home.com/color/light-blue-ral-5012)
- [RAL Classic Sky blue](https://plan-home.com/color/sky-blue-ral-5015)
- [Dulux Atlantic Surf 3](https://plan-home.com/color/atlantic-surf-3)
- [Farrow and Ball Cook's Blue](https://plan-home.com/color/farrow-and-ball-cooks-blue-237)
- [Dulux Royal Regatta 3](https://plan-home.com/color/royal-regatta-3)
- [Little Greene Tivoli](https://plan-home.com/color/little-greene-tivoli-206)
- [Dulux Blueberry Icing](https://plan-home.com/color/blueberry-icing)
- [Dulux Holiday Blues 1](https://plan-home.com/color/holiday-blues-1)
- [Dulux Azure Fusion 3](https://plan-home.com/color/azure-fusion-3)
- [Dulux Delicate Cornflower](https://plan-home.com/color/delicate-cornflower)
- [Tikkurila K431](https://plan-home.com/color/k431)
- [Dulux Celestial Blue 4](https://plan-home.com/color/celestial-blue-4)

## Lighter monochromatic colors
- [Dulux Venetian Crystal 5](https://plan-home.com/color/venetian-crystal-5)
- [Dulux Blue Seduction 1](https://plan-home.com/color/blue-seduction-1)
- [Dulux Sea Blue](https://plan-home.com/color/sea-blue)
- [Dulux Blue Seduction 2](https://plan-home.com/color/blue-seduction-2)
- [Dulux Blue Lagoon](https://plan-home.com/color/blue-lagoon)

## Darker monochromatic colors
- [Dulux Amazon Beat 2](https://plan-home.com/color/amazon-beat-2)
- [Dulux Royal Regatta 1](https://plan-home.com/color/royal-regatta-1)
- [Dulux Luna Landscape 2](https://plan-home.com/color/luna-landscape-2)

## Complementary colors
- [Dulux Cocoa Blush 5](https://plan-home.com/color/cocoa-blush-5)
- [Dulux Chalk Blush 3](https://plan-home.com/color/chalk-blush-3)
- [Dulux Vintage Coins](https://plan-home.com/color/vintage-coins)
- [Dulux Nordic Bliss](https://plan-home.com/color/nordic-bliss)
- [Dulux Thimble Case](https://plan-home.com/color/thimble-case)

## Important note

Digital color values and matches are approximate. Screens, lighting, paint finish, surface texture, and application method can change how a color appears. Test a physical paint sample before making a final decision.