#0A1745
Closest named color: Navy Blue (#001146). oklch(22.8% 0.088 266.9), rgb(10, 23, 69).
Aa
White text reads best on this color (17.19:1).
About this color
#0A1745 is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.088 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.024 away. White text reads best on it, at 17.19:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.22:1 |
| White text | 17.19:1 |
Values
| HEX | #0A1745 |
| RGB | rgb(10, 23, 69) |
| HSL | hsl(227, 75%, 15%) |
| OKLCH | oklch(22.8% 0.088 266.9) |
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 #0A1745 | 17.19:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #0A1745 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #0A1745 text on white | 17.19:1 | AAA | Lc 103.8 | Preferred for body text |
| #0A1745 text on black | 1.22:1 | 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
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#375FF8
oklch(55.6% 0.232 266.9)
-
Step 700
700
#2B4DD8
oklch(49.1% 0.215 266.9)
-
Step 800
800
#2440AF
oklch(42.7% 0.179 267.1)
-
Step 900
900
#20388A
oklch(37.6% 0.14 266.9)
-
Step 950
950 (this color)
#0A1745
oklch(22.8% 0.088 266.9)
#0A1745 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) | #001E47 | 0.021 |
| Deuteranopia (no green cones) | #001944 | 0.012 |
| Tritanopia (no blue cones) | #00232B | 0.070 |
| Achromatopsia (no color) | #1B1B1B | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1745
#0A1745
oklch(22.8% 0.088 266.9)
- #261B00
#261B00
oklch(22.9% 0.047 87.6)
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 #0A1745, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.024
- Night Blue #040348 ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.056
- Oxford Blue #1B263B ΔE 0.062
- Darkblue #030764 ΔE 0.063
- Dark #1B2431 ΔE 0.068
- Dark Navy #000435 ΔE 0.069
Use #0A1745 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.