#0A101E
Closest named color: Rich Navy (#001219). oklch(17.5% 0.031 265.7), rgb(10, 16, 30).
Aa
White text reads best on this color (18.99:1).
About this color
#0A101E is a very dark, muted blue. In OKLCH its lightness is 18%, its chroma 0.031 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.024 away. White text reads best on it, at 18.99:1.
| Hue family | Blues |
| Lightness | very dark (18%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 18.99:1 |
Values
| HEX | #0A101E |
| RGB | rgb(10, 16, 30) |
| HSL | hsl(222, 50%, 8%) |
| OKLCH | oklch(17.5% 0.031 265.7) |
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 #0A101E | 18.99:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #0A101E | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #0A101E text on white | 18.99:1 | AAA | Lc 105.4 | Preferred for body text |
| #0A101E text on black | 1.10:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B5C1D9
oklch(80.9% 0.036 264.3)
-
Step 400
400
#8FA0C6
oklch(70.6% 0.059 266)
-
Step 500
500
#7489B7
oklch(63.1% 0.074 265.4)
-
Step 600
600
#5D72A3
oklch(55.6% 0.081 266.1)
-
Step 700
700
#4C608C
oklch(49.2% 0.075 265.1)
-
Step 800
800
#3F4E71
oklch(42.7% 0.062 266.1)
-
Step 900
900
#35415C
oklch(37.7% 0.049 265.7)
-
Step 950
950 (this color)
#0A101E
oklch(17.5% 0.031 265.7)
#0A101E 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) | #0B111F | 0.004 |
| Deuteranopia (no green cones) | #090F1E | 0.004 |
| Tritanopia (no blue cones) | #041315 | 0.027 |
| Achromatopsia (no color) | #101010 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A101E
#0A101E
oklch(17.5% 0.031 265.7)
- #170F02
#170F02
oklch(17.5% 0.03 82.4)
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 #0A101E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.024
- Almost Black #070D0D ΔE 0.037
- Rich Black #0D1B2A ΔE 0.044
- Midnight #03012D ΔE 0.066
- Dark Navy #000435 ΔE 0.067
- Dark Navy Blue #00022E ΔE 0.067
- Very Dark Blue #000133 ΔE 0.073
- Navy Blue #001146 ΔE 0.080
Use #0A101E 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.