#0A1328
Closest named color: Rich Black (#0D1B2A). oklch(19.1% 0.045 265), rgb(10, 19, 40).
Aa
White text reads best on this color (18.47:1).
About this color
#0A1328 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.045 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 18.47:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.47:1 |
Values
| HEX | #0A1328 |
| RGB | rgb(10, 19, 40) |
| HSL | hsl(222, 60%, 10%) |
| OKLCH | oklch(19.1% 0.045 265) |
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 #0A1328 | 18.47:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #0A1328 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #0A1328 text on white | 18.47:1 | AAA | Lc 105.0 | Preferred for body text |
| #0A1328 text on black | 1.13:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#87A0D6
oklch(70.7% 0.084 265.1)
-
Step 500
500
#6988CB
oklch(63.2% 0.108 264.6)
-
Step 600
600
#5170B8
oklch(55.5% 0.118 265.2)
-
Step 700
700
#425E9F
oklch(49.2% 0.11 265.1)
-
Step 800
800
#364D81
oklch(42.8% 0.091 264.8)
-
Step 900
900
#2F4067
oklch(37.6% 0.071 265.3)
-
Step 950
950 (this color)
#0A1328
oklch(19.1% 0.045 265)
#0A1328 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) | #0A1529 | 0.007 |
| Deuteranopia (no green cones) | #061228 | 0.008 |
| Tritanopia (no blue cones) | #00181B | 0.040 |
| Achromatopsia (no color) | #141414 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1328
#0A1328
oklch(19.1% 0.045 265)
- #1C1200
#1C1200
oklch(19% 0.039 84.1)
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 #0A1328, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Rich Navy #001219 ΔE 0.037
- Almost Black #070D0D ΔE 0.057
- Dark Navy #000435 ΔE 0.060
- Navy Blue #001146 ΔE 0.061
- Midnight #03012D ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.066
- Very Dark Blue #000133 ΔE 0.069
Use #0A1328 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.