#00040F
Closest named color: Almost Black (#070D0D). oklch(10.7% 0.034 253.5), rgb(0, 4, 15).
Aa
White text reads best on this color (20.50:1).
About this color
#00040F is a very dark, muted blue. In OKLCH its lightness is 11%, its chroma 0.034 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Almost Black (#070D0D), ΔE 0.054 away. White text reads best on it, at 20.50:1.
| Hue family | Blues |
| Lightness | very dark (11%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.02:1 |
| White text | 20.50:1 |
Values
| HEX | #00040F |
| RGB | rgb(0, 4, 15) |
| HSL | hsl(224, 100%, 3%) |
| OKLCH | oklch(10.7% 0.034 253.5) |
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 #00040F | 20.50:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #00040F | 1.02:1 | Fails | Lc 0.0 | Not readable |
| #00040F text on white | 20.50:1 | AAA | Lc 106.0 | Preferred for body text |
| #00040F text on black | 1.02:1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A3C8
oklch(70.6% 0.064 253.9)
-
Step 500
500
#668CBA
oklch(63% 0.082 253.7)
-
Step 600
600
#4D76A6
oklch(55.7% 0.088 253.2)
-
Step 700
700
#3E638E
oklch(49.1% 0.081 253.1)
-
Step 800
800
#335174
oklch(42.8% 0.069 253.1)
-
Step 900
900
#2D435D
oklch(37.7% 0.053 253.2)
-
Step 950
950 (this color)
#00040F
oklch(10.7% 0.034 253.5)
#00040F 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) | #01050F | 0.009 |
| Deuteranopia (no green cones) | #00030F | 0.007 |
| Tritanopia (no blue cones) | #000608 | 0.024 |
| Achromatopsia (no color) | #040404 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00040F
#00040F
oklch(10.7% 0.034 253.5)
- #080300
#080300
oklch(10.6% 0.023 70.5)
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 #00040F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.054
- Rich Navy #001219 ΔE 0.064
- Midnight #03012D ΔE 0.067
- Dark Navy Blue #00022E ΔE 0.067
- Very Dark Blue #000133 ΔE 0.077
- Dark Navy #000435 ΔE 0.082
- Very Dark Brown #1D0200 ΔE 0.094
- Rich Black #0D1B2A ΔE 0.111
Use #00040F 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.