Dulux Celestial Blue 4 90BG 21/302

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What are Dulux Celestial Blue 4 undertones?
Is Celestial Blue 4 90BG 21/302 cool or warm?
How light temperature affects on Celestial Blue 4
Monochromatic color scheme
Complementary color scheme
Color comparison and matching
Color codes
Color equivalents

Code:	90BG 21/302
Name:	Celestial Blue 4
Brand:	Dulux

What color is Dulux Celestial Blue 4?

Dulux Celestial Blue 4 90BG 21/302 is a clear, mid-depth blue with a noticeable blue-green cast, reflected in its crisp turquoise-leaning appearance. Its fairly strong saturation gives it enough presence for a feature wall, painted front door, or lower kitchen cabinetry without reading overly dark. In bright daylight, this color can appear cleaner and more blue-cyan, while lower or warmer light may draw out its deeper teal side. Pair Celestial Blue 4 with soft white trim, pale grey, light oak, or brushed nickel for a fresh, practical scheme. It also makes a confident contrast against warm terracotta, clay-toned textiles, and natural woven materials.

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What are Dulux Celestial Blue 4 undertones?

Celestial Blue 4 is a midtone, soft slate blue. The HEX sample leans blue; this describes its measurable digital hue direction, not a hidden paint pigment. Warm bulbs may gray the color down, while cool daylight usually makes its blue or teal direction clearer.

HEX value:

#1883A7

RGB code:

24, 131, 167

Is Dulux Celestial Blue 4 cool or warm?

warm

cool

At 195° on the HSL hue wheel, this dark blue falls clearly in the cool range.

90BG 21/302 Celestial Blue 4 HSL code: 195, 75%, 37%

Hue - degree on a color wheel from 0 to 360. 0 is red, 120 is green, and 240 is blue.
Saturation is expressed as a percentage. At 0%, it appears as a shade of grey, and at 100%, it is in full color.
Lightness is also a percentage value. 0% is black, and 100% is white.

How light temperature affects Celestial Blue 4

Natural Lighting. During the day, natural light shifts from about 2000 K at sunrise/sunset to 5500–6500 K at noon.

Sunrise

Morning

Noon

Afternoon

Sunset

In addition, natural-light temperature depends on its direction:

Direction of sunlight	Visible temp.	Hue	Duration
North	Cool	Bluish	All day
East	Warm	Yellow	Before noon
West	Warm	Orange-red	After noon
South	Warm	Orange-yellow	All day

Artificial Lighting. When choosing bulbs, pay attention to their color temperature in Kelvins.
Use the slider to see how this dark blue shade looks under different lighting:

2000K

3000K

4000K

5000K

6000K

7000K

Coordinating colors.
Colors that go with Dulux Celestial Blue 4:

Monochromatic color scheme

This scheme consists of various shades, tints, and tones of a single color. While it offers a perfect combination of hues, without accent décor it may become monotonous.

Lighter shades

90BG 21/302
Celestial Blue 4

Darker shades

90BG 21/302
Celestial Blue 4

50BG 12/219
Teal Tension

Complementary color scheme

This color scheme is a combination of two shades that are opposite each other on the color wheel. The high contrast between these colors creates a vibrant and dynamic visual effect. For the color Celestial Blue 4 with a green hue, complementary colors are those with a red hue close to 15, such as Dulux Gipsy Bloom 1 and Hazelnut Truffle.

90BG 21/302
Celestial Blue 4

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Celestial Blue 4 90BG 21/302
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