#040A2B
Closest named color: Dark Navy (#000435). oklch(16.5% 0.068 267.9), rgb(4, 10, 43).
Aa
White text reads best on this color (19.38:1).
About this color
#040A2B is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.068 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Navy (#000435), ΔE 0.029 away. White text reads best on it, at 19.38:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Navy (#000435) |
| Black text | 1.08:1 |
| White text | 19.38:1 |
Values
| HEX | #040A2B |
| RGB | rgb(4, 10, 43) |
| HSL | hsl(231, 83%, 9%) |
| OKLCH | oklch(16.5% 0.068 267.9) |
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 #040A2B | 19.38:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #040A2B | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #040A2B text on white | 19.38:1 | AAA | Lc 105.4 | Preferred for body text |
| #040A2B text on black | 1.08:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF5
oklch(80.8% 0.08 268.1)
-
Step 400
400
#7E9DF1
oklch(70.8% 0.128 267.7)
-
Step 500
500
#5F82EC
oklch(63.2% 0.164 267.8)
-
Step 600
600
#4768DA
oklch(55.6% 0.178 268)
-
Step 700
700
#3956BD
oklch(49.1% 0.165 267.9)
-
Step 800
800
#2F4799
oklch(42.7% 0.137 267.9)
-
Step 900
900
#293C7A
oklch(37.6% 0.108 268.1)
-
Step 950
950 (this color)
#040A2B
oklch(16.5% 0.068 267.9)
#040A2B 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) | #000F2C | 0.016 |
| Deuteranopia (no green cones) | #000C2A | 0.010 |
| Tritanopia (no blue cones) | #001319 | 0.053 |
| Achromatopsia (no color) | #0D0D0D | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040A2B
#040A2B
oklch(16.5% 0.068 267.9)
- #150D00
#150D00
oklch(16.5% 0.034 85.3)
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 #040A2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Navy #000435 ΔE 0.029
- Midnight #03012D ΔE 0.031
- Dark Navy Blue #00022E ΔE 0.032
- Very Dark Blue #000133 ΔE 0.036
- Rich Navy #001219 ΔE 0.051
- Navy Blue #001146 ΔE 0.057
- Night Blue #040348 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.063
Use #040A2B 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.