#0A223C
Closest named color: Oxford Blue (#1B263B). oklch(24.9% 0.058 252.7), rgb(10, 34, 60).
Aa
White text reads best on this color (16.06:1).
About this color
#0A223C is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.058 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.027 away. White text reads best on it, at 16.06:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.06:1 |
Values
| HEX | #0A223C |
| RGB | rgb(10, 34, 60) |
| HSL | hsl(211, 71%, 14%) |
| OKLCH | oklch(24.9% 0.058 252.7) |
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 #0A223C | 16.06:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #0A223C | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #0A223C text on white | 16.06:1 | AAA | Lc 102.9 | Preferred for body text |
| #0A223C text on black | 1.30:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A2C4EC
oklch(80.9% 0.068 252.7)
-
Step 400
400
#6DA4E3
oklch(70.6% 0.11 252.7)
-
Step 500
500
#448CDB
oklch(63.1% 0.14 252.7)
-
Step 600
600
#2074C9
oklch(55.5% 0.153 252.9)
-
Step 700
700
#1061AE
oklch(49.1% 0.142 252.9)
-
Step 800
800
#13508D
oklch(42.8% 0.117 252.7)
-
Step 900
900
#184370
oklch(37.8% 0.09 252.3)
-
Step 950
950 (this color)
#0A223C
oklch(24.9% 0.058 252.7)
#0A223C 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) | #16243D | 0.017 |
| Deuteranopia (no green cones) | #0E1F3B | 0.010 |
| Tritanopia (no blue cones) | #00282C | 0.043 |
| Achromatopsia (no color) | #212121 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A223C
#0A223C
oklch(24.9% 0.058 252.7)
- #301C00
#301C00
oklch(24.7% 0.053 72.4)
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 #0A223C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.027
- Dark #1B2431 ΔE 0.032
- Rich Black #0D1B2A ΔE 0.038
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.064
- Marine #042E60 ΔE 0.072
- Gunmetal #293241 ΔE 0.073
Use #0A223C 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.