#0A101D
Closest named color: Rich Navy (#001219). oklch(17.4% 0.029 264.7), rgb(10, 16, 29).
Aa
White text reads best on this color (19.00:1).
About this color
#0A101D is a very dark close to neutral grey. In OKLCH its lightness is 17%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.022 away. White text reads best on it, at 19.00:1.
| Hue family | Neutrals |
| Lightness | very dark (17%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 19.00:1 |
Values
| HEX | #0A101D |
| RGB | rgb(10, 16, 29) |
| HSL | hsl(221, 49%, 8%) |
| OKLCH | oklch(17.4% 0.029 264.7) |
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 #0A101D | 19.00:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #0A101D | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #0A101D text on white | 19.00:1 | AAA | Lc 105.4 | Preferred for body text |
| #0A101D 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
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400
#90A1C3
oklch(70.8% 0.054 264.1)
-
Step 500
500
#7589B4
oklch(63.1% 0.069 265.1)
-
Step 600
600
#5D73A0
oklch(55.7% 0.075 264.1)
-
Step 700
700
#4D6089
oklch(49.1% 0.07 264.9)
-
Step 800
800
#3F4E6F
oklch(42.6% 0.058 265.2)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950 (this color)
#0A101D
oklch(17.4% 0.029 264.7)
#0A101D 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) | #0B111E | 0.005 |
| Deuteranopia (no green cones) | #090F1D | 0.004 |
| Tritanopia (no blue cones) | #041315 | 0.026 |
| Achromatopsia (no color) | #101010 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A101D
#0A101D
oklch(17.4% 0.029 264.7)
- #160F03
#160F03
oklch(17.4% 0.028 83.2)
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 #0A101D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.022
- Almost Black #070D0D ΔE 0.035
- Rich Black #0D1B2A ΔE 0.045
- Midnight #03012D ΔE 0.068
- Dark Navy #000435 ΔE 0.068
- Dark Navy Blue #00022E ΔE 0.069
- Very Dark Blue #000133 ΔE 0.074
- Very Dark Brown #1D0200 ΔE 0.079
Use #0A101D 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.