#00182E
Closest named color: Rich Black (#0D1B2A). oklch(20.4% 0.054 247.6), rgb(0, 24, 46).
Aa
White text reads best on this color (17.94:1).
About this color
#00182E is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.054 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 17.94:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.94:1 |
Values
| HEX | #00182E |
| RGB | rgb(0, 24, 46) |
| HSL | hsl(209, 100%, 9%) |
| OKLCH | oklch(20.4% 0.054 247.6) |
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 #00182E | 17.94:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #00182E | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #00182E text on white | 17.94:1 | AAA | Lc 104.5 | Preferred for body text |
| #00182E text on black | 1.17:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A0C5E9
oklch(80.9% 0.065 247.9)
-
Step 400
400
#6AA6DE
oklch(70.7% 0.104 247.9)
-
Step 500
500
#3D8FD4
oklch(63.1% 0.131 247.2)
-
Step 600
600
#1077C2
oklch(55.5% 0.144 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#075287
oklch(42.7% 0.109 247.3)
-
Step 900
900
#13446C
oklch(37.6% 0.086 247.6)
-
Step 950
950 (this color)
#00182E
oklch(20.4% 0.054 247.6)
#00182E 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) | #0D192F | 0.019 |
| Deuteranopia (no green cones) | #05152E | 0.012 |
| Tritanopia (no blue cones) | #001D20 | 0.038 |
| Achromatopsia (no color) | #171717 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00182E
#00182E
oklch(20.4% 0.054 247.6)
- #241200
#241200
oklch(20.3% 0.045 67.2)
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 #00182E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Rich Navy #001219 ΔE 0.045
- Navy Blue #001146 ΔE 0.052
- Dark #1B2431 ΔE 0.061
- Dark Navy #000435 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.068
- Almost Black #070D0D ΔE 0.071
- Night Blue #040348 ΔE 0.072
Use #00182E 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.