#040C19
Closest named color: Rich Navy (#001219). oklch(15.3% 0.032 256.4), rgb(4, 12, 25).
Aa
White text reads best on this color (19.59:1).
About this color
#040C19 is a very dark, muted blue. In OKLCH its lightness is 15%, its chroma 0.032 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.024 away. White text reads best on it, at 19.59:1.
| Hue family | Blues |
| Lightness | very dark (15%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.59:1 |
Values
| HEX | #040C19 |
| RGB | rgb(4, 12, 25) |
| HSL | hsl(217, 72%, 6%) |
| OKLCH | oklch(15.3% 0.032 256.4) |
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 #040C19 | 19.59:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #040C19 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040C19 text on white | 19.59:1 | AAA | Lc 105.7 | Preferred for body text |
| #040C19 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B1C2D9
oklch(80.8% 0.038 256)
-
Step 400
400
#89A3C6
oklch(70.8% 0.059 255.9)
-
Step 500
500
#6B8BB8
oklch(63% 0.077 257)
-
Step 600
600
#5375A4
oklch(55.7% 0.083 256.6)
-
Step 700
700
#43628C
oklch(49.1% 0.077 256.2)
-
Step 800
800
#375072
oklch(42.7% 0.065 256.3)
-
Step 900
900
#30435C
oklch(37.8% 0.049 255.5)
-
Step 950
950 (this color)
#040C19
oklch(15.3% 0.032 256.4)
#040C19 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) | #070D1A | 0.008 |
| Deuteranopia (no green cones) | #050B19 | 0.004 |
| Tritanopia (no blue cones) | #000F11 | 0.026 |
| Achromatopsia (no color) | #0C0C0C | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040C19
#040C19
oklch(15.3% 0.032 256.4)
- #130A00
#130A00
oklch(15.4% 0.032 79.3)
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 #040C19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.024
- Almost Black #070D0D ΔE 0.028
- Midnight #03012D ΔE 0.059
- Dark Navy Blue #00022E ΔE 0.059
- Rich Black #0D1B2A ΔE 0.065
- Dark Navy #000435 ΔE 0.065
- Very Dark Blue #000133 ΔE 0.067
- Very Dark Brown #1D0200 ΔE 0.080
Use #040C19 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.