#0A184C
Closest named color: Navy Blue (#001146). oklch(23.8% 0.098 266.8), rgb(10, 24, 76).
Aa
White text reads best on this color (16.82:1).
About this color
#0A184C is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.098 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.029 away. White text reads best on it, at 16.82:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.24:1 |
| White text | 16.82:1 |
Values
| HEX | #0A184C |
| RGB | rgb(10, 24, 76) |
| HSL | hsl(227, 77%, 17%) |
| OKLCH | oklch(23.8% 0.098 266.8) |
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 #0A184C | 16.82:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #0A184C | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #0A184C text on white | 16.82:1 | AAA | Lc 103.4 | Preferred for body text |
| #0A184C text on black | 1.24:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#345CFF
oklch(55.5% 0.245 266.9)
-
Step 700
700
#2647E5
oklch(49.1% 0.239 266.8)
-
Step 800
800
#1F3CB9
oklch(42.7% 0.198 266.7)
-
Step 900
900
#1D3692
oklch(37.8% 0.154 266.8)
-
Step 950
950 (this color)
#0A184C
oklch(23.8% 0.098 266.8)
#0A184C 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) | #00204E | 0.023 |
| Deuteranopia (no green cones) | #001A4B | 0.011 |
| Tritanopia (no blue cones) | #00252F | 0.075 |
| Achromatopsia (no color) | #1D1D1D | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A184C
#0A184C
oklch(23.8% 0.098 266.8)
- #291D00
#291D00
oklch(23.9% 0.049 86.7)
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 #0A184C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.029
- Dark Indigo #1F0954 ΔE 0.044
- Night Blue #040348 ΔE 0.052
- Darkblue #030764 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.064
- Rich Black #0D1B2A ΔE 0.067
- Dark Royal Blue #02066F ΔE 0.068
- Midnight Blue #191970 ΔE 0.069
Use #0A184C 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.