#0A121A
Closest named color: Rich Navy (#001219). oklch(17.8% 0.021 249.1), rgb(10, 18, 26).
Aa
White text reads best on this color (18.84:1).
About this color
#0A121A is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.018 away. White text reads best on it, at 18.84:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.84:1 |
Values
| HEX | #0A121A |
| RGB | rgb(10, 18, 26) |
| HSL | hsl(210, 44%, 7%) |
| OKLCH | oklch(17.8% 0.021 249.1) |
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 #0A121A | 18.84:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #0A121A | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #0A121A text on white | 18.84:1 | AAA | Lc 105.3 | Preferred for body text |
| #0A121A text on black | 1.11:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B8
oklch(70.6% 0.039 248.4)
-
Step 500
500
#728CA7
oklch(63% 0.051 249.6)
-
Step 600
600
#5B7692
oklch(55.6% 0.054 249.7)
-
Step 700
700
#4A637D
oklch(49% 0.052 249.9)
-
Step 800
800
#3D5165
oklch(42.7% 0.042 248.8)
-
Step 900
900
#344352
oklch(37.6% 0.032 248.7)
-
Step 950
950 (this color)
#0A121A
oklch(17.8% 0.021 249.1)
#0A121A 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) | #0F121A | 0.009 |
| Deuteranopia (no green cones) | #0D111A | 0.006 |
| Tritanopia (no blue cones) | #051415 | 0.017 |
| Achromatopsia (no color) | #111111 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A121A
#0A121A
oklch(17.8% 0.021 249.1)
- #171007
#171007
oklch(17.9% 0.021 73.7)
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 #0A121A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.018
- Almost Black #070D0D ΔE 0.031
- Rich Black #0D1B2A ΔE 0.042
- Very Dark Brown #1D0200 ΔE 0.077
- Dark Navy #000435 ΔE 0.078
- Midnight #03012D ΔE 0.078
- Dark Navy Blue #00022E ΔE 0.078
- Dark #1B2431 ΔE 0.080
Use #0A121A 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.