#0A121F
Closest named color: Rich Navy (#001219). oklch(18.2% 0.03 259.8), rgb(10, 18, 31).
Aa
White text reads best on this color (18.76:1).
About this color
#0A121F is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.023 away. White text reads best on it, at 18.76:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.76:1 |
Values
| HEX | #0A121F |
| RGB | rgb(10, 18, 31) |
| HSL | hsl(217, 51%, 8%) |
| OKLCH | oklch(18.2% 0.03 259.8) |
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 #0A121F | 18.76:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #0A121F | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #0A121F text on white | 18.76:1 | AAA | Lc 105.2 | Preferred for body text |
| #0A121F 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C2D8
oklch(81% 0.035 259.4)
-
Step 400
400
#8CA2C4
oklch(70.7% 0.056 259)
-
Step 500
500
#708AB5
oklch(63% 0.072 260.3)
-
Step 600
600
#5874A1
oklch(55.6% 0.078 259.7)
-
Step 700
700
#48618A
oklch(49.1% 0.073 260)
-
Step 800
800
#3B4F70
oklch(42.6% 0.061 260.2)
-
Step 900
900
#33425B
oklch(37.7% 0.047 260.4)
-
Step 950
950 (this color)
#0A121F
oklch(18.2% 0.03 259.8)
#0A121F 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) | #0D1320 | 0.007 |
| Deuteranopia (no green cones) | #0B111F | 0.004 |
| Tritanopia (no blue cones) | #031517 | 0.026 |
| Achromatopsia (no color) | #121212 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A121F
#0A121F
oklch(18.2% 0.03 259.8)
- #191003
#191003
oklch(18.1% 0.03 78.3)
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 #0A121F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.023
- Rich Black #0D1B2A ΔE 0.037
- Almost Black #070D0D ΔE 0.040
- Dark Navy #000435 ΔE 0.070
- Midnight #03012D ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.072
- Dark #1B2431 ΔE 0.076
- Very Dark Blue #000133 ΔE 0.077
Use #0A121F 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.