#00182D
Closest named color: Rich Black (#0D1B2A). oklch(20.3% 0.053 246.5), rgb(0, 24, 45).
Aa
White text reads best on this color (17.97:1).
About this color
#00182D is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.053 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 17.97:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.97:1 |
Values
| HEX | #00182D |
| RGB | rgb(0, 24, 45) |
| HSL | hsl(208, 100%, 9%) |
| OKLCH | oklch(20.3% 0.053 246.5) |
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 #00182D | 17.97:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #00182D | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #00182D text on white | 17.97:1 | AAA | Lc 104.5 | Preferred for body text |
| #00182D text on black | 1.16:1 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#6BA7DC
oklch(70.9% 0.1 246.4)
-
Step 500
500
#3E8FD2
oklch(63.1% 0.128 246.7)
-
Step 600
600
#1178BF
oklch(55.6% 0.139 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#085286
oklch(42.6% 0.108 247)
-
Step 900
900
#14456B
oklch(37.8% 0.083 246.2)
-
Step 950
950 (this color)
#00182D
oklch(20.3% 0.053 246.5)
#00182D 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) | #0E192E | 0.020 |
| Deuteranopia (no green cones) | #06152D | 0.012 |
| Tritanopia (no blue cones) | #001D20 | 0.036 |
| Achromatopsia (no color) | #171717 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00182D
#00182D
oklch(20.3% 0.053 246.5)
- #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 #00182D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.043
- Navy Blue #001146 ΔE 0.054
- Dark #1B2431 ΔE 0.061
- Dark Navy #000435 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.068
- Almost Black #070D0D ΔE 0.069
- Jet #212529 ΔE 0.073
Use #00182D 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.