#040B1F
Closest named color: Rich Navy (#001219). oklch(15.6% 0.045 264.3), rgb(4, 11, 31).
Aa
White text reads best on this color (19.57:1).
About this color
#040B1F is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.045 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.033 away. White text reads best on it, at 19.57:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.57:1 |
Values
| HEX | #040B1F |
| RGB | rgb(4, 11, 31) |
| HSL | hsl(224, 77%, 7%) |
| OKLCH | oklch(15.6% 0.045 264.3) |
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 #040B1F | 19.57:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #040B1F | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040B1F text on white | 19.57:1 | AAA | Lc 105.7 | Preferred for body text |
| #040B1F 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFD9ED
oklch(88.4% 0.03 264.4)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#86A0D6
oklch(70.6% 0.085 264.4)
-
Step 500
500
#6888CB
oklch(63.1% 0.108 264.1)
-
Step 600
600
#5071B8
oklch(55.7% 0.117 264.1)
-
Step 700
700
#415E9E
oklch(49.1% 0.109 264.4)
-
Step 800
800
#364D80
oklch(42.7% 0.09 264.6)
-
Step 900
900
#2E4067
oklch(37.6% 0.071 264.4)
-
Step 950
950 (this color)
#040B1F
oklch(15.6% 0.045 264.3)
#040B1F 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) | #030D20 | 0.007 |
| Deuteranopia (no green cones) | #010B1F | 0.007 |
| Tritanopia (no blue cones) | #001013 | 0.037 |
| Achromatopsia (no color) | #0C0C0C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040B1F
#040B1F
oklch(15.6% 0.045 264.3)
- #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 #040B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.033
- Almost Black #070D0D ΔE 0.042
- Midnight #03012D ΔE 0.046
- Dark Navy Blue #00022E ΔE 0.047
- Dark Navy #000435 ΔE 0.051
- Very Dark Blue #000133 ΔE 0.054
- Rich Black #0D1B2A ΔE 0.063
- Navy Blue #001146 ΔE 0.080
Use #040B1F 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.