#040B20
Closest named color: Rich Navy (#001219). oklch(15.6% 0.046 264.8), rgb(4, 11, 32).
Aa
White text reads best on this color (19.55:1).
About this color
#040B20 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.046 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.034 away. White text reads best on it, at 19.55:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.55:1 |
Values
| HEX | #040B20 |
| RGB | rgb(4, 11, 32) |
| HSL | hsl(225, 78%, 7%) |
| OKLCH | oklch(15.6% 0.046 264.8) |
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 #040B20 | 19.55:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #040B20 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040B20 text on white | 19.55:1 | AAA | Lc 105.6 | Preferred for body text |
| #040B20 text on black | 1.07:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#86A0D8
oklch(70.7% 0.088 265)
-
Step 500
500
#6887CE
oklch(63.1% 0.113 265.4)
-
Step 600
600
#4F70BB
oklch(55.6% 0.123 264.8)
-
Step 700
700
#405EA1
oklch(49.2% 0.113 264.4)
-
Step 800
800
#354D82
oklch(42.8% 0.093 264.4)
-
Step 900
900
#2E4068
oklch(37.6% 0.073 264.8)
-
Step 950
950 (this color)
#040B20
oklch(15.6% 0.046 264.8)
#040B20 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) | #020D21 | 0.008 |
| Deuteranopia (no green cones) | #000B20 | 0.010 |
| Tritanopia (no blue cones) | #001013 | 0.039 |
| Achromatopsia (no color) | #0C0C0C | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B20
#040B20
oklch(15.6% 0.046 264.8)
- #130B00
#130B00
oklch(15.7% 0.032 83.5)
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 #040B20, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.034
- Almost Black #070D0D ΔE 0.044
- Midnight #03012D ΔE 0.044
- Dark Navy Blue #00022E ΔE 0.045
- Dark Navy #000435 ΔE 0.049
- Very Dark Blue #000133 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.063
- Navy Blue #001146 ΔE 0.078
Use #040B20 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.