#0A232F
Closest named color: Dark (#1B2431). oklch(24.3% 0.038 232.2), rgb(10, 35, 47).
Aa
White text reads best on this color (16.22:1).
About this color
#0A232F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.038 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.023 away. White text reads best on it, at 16.22:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.22:1 |
Values
| HEX | #0A232F |
| RGB | rgb(10, 35, 47) |
| HSL | hsl(199, 65%, 11%) |
| OKLCH | oklch(24.3% 0.038 232.2) |
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 #0A232F | 16.22:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #0A232F | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0A232F text on white | 16.22:1 | AAA | Lc 103.1 | Preferred for body text |
| #0A232F text on black | 1.29:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A4C6D9
oklch(80.8% 0.045 232.5)
-
Step 400
400
#71A9C6
oklch(70.7% 0.072 231.7)
-
Step 500
500
#4893B8
oklch(63.1% 0.093 232.3)
-
Step 600
600
#247DA4
oklch(55.6% 0.101 232)
-
Step 700
700
#15698C
oklch(49% 0.093 232)
-
Step 800
800
#165672
oklch(42.8% 0.077 232)
-
Step 900
900
#1B475C
oklch(37.7% 0.06 232.2)
-
Step 950
950 (this color)
#0A232F
oklch(24.3% 0.038 232.2)
#0A232F 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) | #1D2230 | 0.025 |
| Deuteranopia (no green cones) | #181F2F | 0.021 |
| Tritanopia (no blue cones) | #002627 | 0.024 |
| Achromatopsia (no color) | #202020 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A232F
#0A232F
oklch(24.3% 0.038 232.2)
- #2E1B0E
#2E1B0E
oklch(24.4% 0.038 54.4)
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 #0A232F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.023
- Rich Black #0D1B2A ΔE 0.028
- Oxford Blue #1B263B ΔE 0.034
- Jet #212529 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.069
- Rich Navy #001219 ΔE 0.074
- Gunmetal #293241 ΔE 0.075
- Navy Blue #001146 ΔE 0.079
Use #0A232F 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.