#0A0B23
Closest named color: Rich Navy (#001219). oklch(16.5% 0.049 277.8), rgb(10, 11, 35).
Aa
White text reads best on this color (19.35:1).
About this color
#0A0B23 is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.049 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.041 away. White text reads best on it, at 19.35:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.08:1 |
| White text | 19.35:1 |
Values
| HEX | #0A0B23 |
| RGB | rgb(10, 11, 35) |
| HSL | hsl(238, 56%, 9%) |
| OKLCH | oklch(16.5% 0.049 277.8) |
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 #0A0B23 | 19.35:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #0A0B23 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #0A0B23 text on white | 19.35:1 | AAA | Lc 105.5 | Preferred for body text |
| #0A0B23 text on black | 1.08:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B7BEE7
oklch(81% 0.058 277.4)
-
Step 400
400
#929BDA
oklch(70.6% 0.093 277.5)
-
Step 500
500
#7981D0
oklch(63.1% 0.119 278)
-
Step 600
600
#6269BD
oklch(55.5% 0.129 277.7)
-
Step 700
700
#5257A3
oklch(49% 0.12 278.1)
-
Step 800
800
#434884
oklch(42.7% 0.099 277.8)
-
Step 900
900
#383D6A
oklch(37.8% 0.077 277.3)
-
Step 950
950 (this color)
#0A0B23
oklch(16.5% 0.049 277.8)
#0A0B23 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) | #020F24 | 0.019 |
| Deuteranopia (no green cones) | #010D22 | 0.019 |
| Tritanopia (no blue cones) | #021015 | 0.042 |
| Achromatopsia (no color) | #0E0E0E | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A0B23
#0A0B23
oklch(16.5% 0.049 277.8)
- #120E00
#120E00
oklch(16.4% 0.034 98)
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 #0A0B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.041
- Midnight #03012D ΔE 0.046
- Dark Navy Blue #00022E ΔE 0.049
- Dark Navy #000435 ΔE 0.050
- Almost Black #070D0D ΔE 0.050
- Very Dark Blue #000133 ΔE 0.055
- Rich Black #0D1B2A ΔE 0.057
- Navy Blue #001146 ΔE 0.072
Use #0A0B23 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.