#0A1229
Closest named color: Rich Black (#0D1B2A). oklch(18.9% 0.048 267.3), rgb(10, 18, 41).
Aa
White text reads best on this color (18.56:1).
About this color
#0A1229 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.048 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 18.56:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.56:1 |
Values
| HEX | #0A1229 |
| RGB | rgb(10, 18, 41) |
| HSL | hsl(225, 61%, 10%) |
| OKLCH | oklch(18.9% 0.048 267.3) |
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 #0A1229 | 18.56:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #0A1229 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #0A1229 text on white | 18.56:1 | AAA | Lc 105.1 | Preferred for body text |
| #0A1229 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#879FDA
oklch(70.7% 0.091 267)
-
Step 500
500
#6A86D0
oklch(63.1% 0.116 267.3)
-
Step 600
600
#526FBD
oklch(55.7% 0.126 266.9)
-
Step 700
700
#435CA3
oklch(49.1% 0.118 267.4)
-
Step 800
800
#374C84
oklch(42.8% 0.097 266.8)
-
Step 900
900
#303F6A
oklch(37.6% 0.076 268.1)
-
Step 950
950 (this color)
#0A1229
oklch(18.9% 0.048 267.3)
#0A1229 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) | #08152A | 0.010 |
| Deuteranopia (no green cones) | #041229 | 0.010 |
| Tritanopia (no blue cones) | #00171B | 0.041 |
| Achromatopsia (no color) | #131313 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1229
#0A1229
oklch(18.9% 0.048 267.3)
- #1B1200
#1B1200
oklch(18.9% 0.039 86.5)
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 #0A1229, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Rich Navy #001219 ΔE 0.040
- Dark Navy #000435 ΔE 0.056
- Navy Blue #001146 ΔE 0.058
- Almost Black #070D0D ΔE 0.059
- Midnight #03012D ΔE 0.062
- Dark Navy Blue #00022E ΔE 0.062
- Very Dark Blue #000133 ΔE 0.065
Use #0A1229 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.