#0A1027
Closest named color: Rich Navy (#001219). oklch(18.2% 0.048 270.1), rgb(10, 16, 39).
Aa
White text reads best on this color (18.81:1).
About this color
#0A1027 is a very dark, muted blue. In OKLCH its lightness is 18%, its chroma 0.048 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.038 away. White text reads best on it, at 18.81:1.
| Hue family | Blues |
| Lightness | very dark (18%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.81:1 |
Values
| HEX | #0A1027 |
| RGB | rgb(10, 16, 39) |
| HSL | hsl(228, 59%, 10%) |
| OKLCH | oklch(18.2% 0.048 270.1) |
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 #0A1027 | 18.81:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #0A1027 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #0A1027 text on white | 18.81:1 | AAA | Lc 105.2 | Preferred for body text |
| #0A1027 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2C0E6
oklch(81% 0.056 269.2)
-
Step 400
400
#8B9EDA
oklch(70.7% 0.091 270.5)
-
Step 500
500
#6E85D0
oklch(63.1% 0.116 269.9)
-
Step 600
600
#576DBD
oklch(55.5% 0.127 270.3)
-
Step 700
700
#475BA3
oklch(49.1% 0.118 270)
-
Step 800
800
#3B4B84
oklch(42.8% 0.097 270.1)
-
Step 900
900
#323F6A
oklch(37.8% 0.076 269.8)
-
Step 950
950 (this color)
#0A1027
oklch(18.2% 0.048 270.1)
#0A1027 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) | #061328 | 0.011 |
| Deuteranopia (no green cones) | #031027 | 0.012 |
| Tritanopia (no blue cones) | #001519 | 0.042 |
| Achromatopsia (no color) | #111111 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1027
#0A1027
oklch(18.2% 0.048 270.1)
- #181100
#181100
oklch(18.1% 0.037 91.1)
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 #0A1027, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.038
- Rich Black #0D1B2A ΔE 0.040
- Dark Navy #000435 ΔE 0.053
- Almost Black #070D0D ΔE 0.055
- Midnight #03012D ΔE 0.057
- Dark Navy Blue #00022E ΔE 0.058
- Very Dark Blue #000133 ΔE 0.061
- Navy Blue #001146 ΔE 0.062
Use #0A1027 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.