#0A1129
Closest named color: Rich Black (#0D1B2A). oklch(18.7% 0.05 268.9), rgb(10, 17, 41).
Aa
White text reads best on this color (18.66:1).
About this color
#0A1129 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.050 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.037 away. White text reads best on it, at 18.66:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.66:1 |
Values
| HEX | #0A1129 |
| RGB | rgb(10, 17, 41) |
| HSL | hsl(226, 61%, 10%) |
| OKLCH | oklch(18.7% 0.05 268.9) |
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 #0A1129 | 18.66:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #0A1129 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #0A1129 text on white | 18.66:1 | AAA | Lc 105.1 | Preferred for body text |
| #0A1129 text on black | 1.12:1 | 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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1C0E8
oklch(81% 0.059 268.9)
-
Step 400
400
#889EDC
oklch(70.6% 0.095 268.9)
-
Step 500
500
#6B85D3
oklch(63.1% 0.122 268.8)
-
Step 600
600
#546DC0
oklch(55.5% 0.132 269.2)
-
Step 700
700
#455BA5
oklch(49.1% 0.121 269.1)
-
Step 800
800
#384B86
oklch(42.8% 0.101 268.5)
-
Step 900
900
#303F6B
oklch(37.7% 0.078 268.3)
-
Step 950
950 (this color)
#0A1129
oklch(18.7% 0.05 268.9)
#0A1129 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) | #06142A | 0.011 |
| Deuteranopia (no green cones) | #031128 | 0.012 |
| Tritanopia (no blue cones) | #00161A | 0.043 |
| Achromatopsia (no color) | #121212 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1129
#0A1129
oklch(18.7% 0.05 268.9)
- #1A1200
#1A1200
oklch(18.7% 0.038 89.1)
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 #0A1129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.037
- Rich Navy #001219 ΔE 0.040
- Dark Navy #000435 ΔE 0.053
- Navy Blue #001146 ΔE 0.058
- Midnight #03012D ΔE 0.059
- Almost Black #070D0D ΔE 0.059
- Dark Navy Blue #00022E ΔE 0.059
- Very Dark Blue #000133 ΔE 0.062
Use #0A1129 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.