#040F20
Closest named color: Rich Navy (#001219). oklch(16.8% 0.04 256.6), rgb(4, 15, 32).
Aa
White text reads best on this color (19.18:1).
About this color
#040F20 is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.040 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.022 away. White text reads best on it, at 19.18:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.18:1 |
Values
| HEX | #040F20 |
| RGB | rgb(4, 15, 32) |
| HSL | hsl(216, 78%, 7%) |
| OKLCH | oklch(16.8% 0.04 256.6) |
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 #040F20 | 19.18:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #040F20 | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #040F20 text on white | 19.18:1 | AAA | Lc 105.5 | Preferred for body text |
| #040F20 text on black | 1.09:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ADC2E0
oklch(80.8% 0.048 257.3)
-
Step 400
400
#82A3D0
oklch(70.8% 0.076 256.3)
-
Step 500
500
#628BC4
oklch(63.1% 0.098 256.8)
-
Step 600
600
#4974B0
oklch(55.5% 0.106 256.9)
-
Step 700
700
#3A6197
oklch(49% 0.098 256.8)
-
Step 800
800
#30507B
oklch(42.8% 0.081 256.2)
-
Step 900
900
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950 (this color)
#040F20
oklch(16.8% 0.04 256.6)
#040F20 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) | #071021 | 0.008 |
| Deuteranopia (no green cones) | #040E20 | 0.004 |
| Tritanopia (no blue cones) | #001315 | 0.033 |
| Achromatopsia (no color) | #0F0F0F | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040F20
#040F20
oklch(16.8% 0.04 256.6)
- #180D00
#180D00
oklch(17% 0.036 77)
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 #040F20, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.022
- Almost Black #070D0D ΔE 0.039
- Rich Black #0D1B2A ΔE 0.050
- Dark Navy Blue #00022E ΔE 0.056
- Midnight #03012D ΔE 0.056
- Dark Navy #000435 ΔE 0.057
- Very Dark Blue #000133 ΔE 0.062
- Navy Blue #001146 ΔE 0.075
Use #040F20 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.