#0A243D
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.057 250.3), rgb(10, 36, 61).
Aa
White text reads best on this color (15.75:1).
About this color
#0A243D is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.057 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 15.75:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.75:1 |
Values
| HEX | #0A243D |
| RGB | rgb(10, 36, 61) |
| HSL | hsl(209, 72%, 14%) |
| OKLCH | oklch(25.5% 0.057 250.3) |
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 #0A243D | 15.75:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #0A243D | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #0A243D text on white | 15.75:1 | AAA | Lc 102.5 | Preferred for body text |
| #0A243D text on black | 1.33:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#A0C5EB
oklch(81% 0.067 249.3)
-
Step 400
400
#6BA5E1
oklch(70.6% 0.107 250.3)
-
Step 500
500
#3F8DD9
oklch(63% 0.138 250.5)
-
Step 600
600
#1676C7
oklch(55.7% 0.15 250.4)
-
Step 700
700
#0262AC
oklch(49% 0.14 250.7)
-
Step 800
800
#0B518B
oklch(42.8% 0.115 250.1)
-
Step 900
900
#15436F
oklch(37.6% 0.09 250.8)
-
Step 950
950 (this color)
#0A243D
oklch(25.5% 0.057 250.3)
#0A243D 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) | #19253E | 0.019 |
| Deuteranopia (no green cones) | #11213D | 0.012 |
| Tritanopia (no blue cones) | #002A2D | 0.043 |
| Achromatopsia (no color) | #232323 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A243D
#0A243D
oklch(25.5% 0.057 250.3)
- #331D00
#331D00
oklch(25.4% 0.055 70.1)
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 #0A243D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Dark #1B2431 ΔE 0.030
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.058
- Navy Blue #001146 ΔE 0.066
- Gunmetal #293241 ΔE 0.067
- Marine #042E60 ΔE 0.067
Use #0A243D 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.