#0A1D5F
Closest named color: Midnight Blue (#191970). oklch(26.9% 0.119 265.8), rgb(10, 29, 95).
Aa
White text reads best on this color (15.51:1).
About this color
#0A1D5F is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.119 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.035 away. White text reads best on it, at 15.51:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.35:1 |
| White text | 15.51:1 |
Values
| HEX | #0A1D5F |
| RGB | rgb(10, 29, 95) |
| HSL | hsl(227, 81%, 21%) |
| OKLCH | oklch(26.9% 0.119 265.8) |
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 #0A1D5F | 15.51:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #0A1D5F | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #0A1D5F text on white | 15.51:1 | AAA | Lc 101.9 | Preferred for body text |
| #0A1D5F text on black | 1.35:1 | 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
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#507FFF
oklch(63.1% 0.197 265.8)
-
Step 600
600
#2E5DFF
oklch(55.5% 0.245 265.8)
-
Step 700
700
#1835FF
oklch(49.1% 0.287 265.7)
-
Step 800
800
#132ED0
oklch(42.7% 0.242 265.8)
-
Step 900
900
#122EA3
oklch(37.6% 0.189 265.8)
-
Step 950
950 (this color)
#0A1D5F
oklch(26.9% 0.119 265.8)
#0A1D5F 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) | #002861 | 0.029 |
| Deuteranopia (no green cones) | #00205E | 0.010 |
| Tritanopia (no blue cones) | #002F3B | 0.092 |
| Achromatopsia (no color) | #242424 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1D5F
#0A1D5F
oklch(26.9% 0.119 265.8)
- #322400
#322400
oklch(27% 0.055 86.6)
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 #0A1D5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.035
- Darkblue #030764 ΔE 0.044
- Marine #042E60 ΔE 0.047
- Dark Royal Blue #02066F ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.052
- Deep Blue #040273 ΔE 0.054
- Navy Blue #001146 ΔE 0.061
- Navy #000080 ΔE 0.069
Use #0A1D5F 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.