#0A1B3F
Closest named color: Navy Blue (#001146). oklch(23.2% 0.073 263), rgb(10, 27, 63).
Aa
White text reads best on this color (16.91:1).
About this color
#0A1B3F is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.073 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.037 away. White text reads best on it, at 16.91:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #0A1B3F |
| RGB | rgb(10, 27, 63) |
| HSL | hsl(221, 73%, 14%) |
| OKLCH | oklch(23.2% 0.073 263) |
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 #0A1B3F | 16.91:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #0A1B3F | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #0A1B3F text on white | 16.91:1 | AAA | Lc 103.6 | Preferred for body text |
| #0A1B3F 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#729FF6
oklch(70.8% 0.137 262.6)
-
Step 500
500
#4E84F2
oklch(63.2% 0.175 262.8)
-
Step 600
600
#336AE1
oklch(55.6% 0.191 263)
-
Step 700
700
#2657C3
oklch(49% 0.178 263.1)
-
Step 800
800
#20489E
oklch(42.7% 0.147 262.9)
-
Step 900
900
#1F3D7D
oklch(37.5% 0.115 263.1)
-
Step 950
950 (this color)
#0A1B3F
oklch(23.2% 0.073 263)
#0A1B3F 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) | #061F40 | 0.013 |
| Deuteranopia (no green cones) | #001A3E | 0.013 |
| Tritanopia (no blue cones) | #00242A | 0.058 |
| Achromatopsia (no color) | #1D1D1D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1B3F
#0A1B3F
oklch(23.2% 0.073 263)
- #281B00
#281B00
oklch(23.2% 0.048 83.7)
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 #0A1B3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.037
- Rich Black #0D1B2A ΔE 0.041
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.062
- Night Blue #040348 ΔE 0.063
- Jet #212529 ΔE 0.070
- Dark Navy #000435 ΔE 0.076
Use #0A1B3F 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.