#0A183A
Closest named color: Navy Blue (#001146). oklch(22% 0.069 264.6), rgb(10, 24, 58).
Aa
White text reads best on this color (17.43:1).
About this color
#0A183A is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.069 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.035 away. White text reads best on it, at 17.43:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.20:1 |
| White text | 17.43:1 |
Values
| HEX | #0A183A |
| RGB | rgb(10, 24, 58) |
| HSL | hsl(223, 71%, 13%) |
| OKLCH | oklch(22% 0.069 264.6) |
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 #0A183A | 17.43:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #0A183A | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #0A183A text on white | 17.43:1 | AAA | Lc 104.1 | Preferred for body text |
| #0A183A text on black | 1.20:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A7C0F6
oklch(80.8% 0.082 265.3)
-
Step 400
400
#789EF2
oklch(70.7% 0.131 264.8)
-
Step 500
500
#5683ED
oklch(63% 0.167 264.7)
-
Step 600
600
#3C6ADB
oklch(55.5% 0.181 264.5)
-
Step 700
700
#2F58BE
oklch(49.1% 0.167 264.5)
-
Step 800
800
#27489A
oklch(42.6% 0.14 264.6)
-
Step 900
900
#243E7A
oklch(37.8% 0.107 264.3)
-
Step 950
950 (this color)
#0A183A
oklch(22% 0.069 264.6)
#0A183A 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) | #051C3B | 0.013 |
| Deuteranopia (no green cones) | #001839 | 0.013 |
| Tritanopia (no blue cones) | #002026 | 0.055 |
| Achromatopsia (no color) | #1A1A1A | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A183A
#0A183A
oklch(22% 0.069 264.6)
- #241800
#241800
oklch(21.8% 0.045 83.8)
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 #0A183A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.035
- Oxford Blue #1B263B ΔE 0.056
- Dark #1B2431 ΔE 0.056
- Night Blue #040348 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.066
- Dark Navy #000435 ΔE 0.066
- Rich Navy #001219 ΔE 0.071
Use #0A183A 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.