#0A2147
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.077 260), rgb(10, 33, 71).
Aa
White text reads best on this color (15.89:1).
About this color
#0A2147 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.077 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.038 away. White text reads best on it, at 15.89:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.89:1 |
Values
| HEX | #0A2147 |
| RGB | rgb(10, 33, 71) |
| HSL | hsl(217, 75%, 16%) |
| OKLCH | oklch(25.5% 0.077 260) |
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 #0A2147 | 15.89:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #0A2147 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #0A2147 text on white | 15.89:1 | AAA | Lc 102.6 | Preferred for body text |
| #0A2147 text on black | 1.32:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9EC2FC
oklch(80.9% 0.091 259.8)
-
Step 400
400
#69A0FA
oklch(70.7% 0.145 259.8)
-
Step 500
500
#3F85F8
oklch(63.2% 0.186 259.9)
-
Step 600
600
#1C6BE7
oklch(55.7% 0.202 259.9)
-
Step 700
700
#0E58C9
oklch(49.1% 0.189 260)
-
Step 800
800
#1049A2
oklch(42.7% 0.155 259.8)
-
Step 900
900
#153E81
oklch(37.7% 0.122 259.9)
-
Step 950
950 (this color)
#0A2147
oklch(25.5% 0.077 260)
#0A2147 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) | #0C2548 | 0.013 |
| Deuteranopia (no green cones) | #001F46 | 0.013 |
| Tritanopia (no blue cones) | #002A30 | 0.060 |
| Achromatopsia (no color) | #222222 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2147
#0A2147
oklch(25.5% 0.077 260)
- #301F00
#301F00
oklch(25.4% 0.053 79.1)
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 #0A2147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.038
- Dark #1B2431 ΔE 0.049
- Navy Blue #001146 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.056
- Marine #042E60 ΔE 0.057
- Dark Indigo #1F0954 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.066
- Jet #212529 ΔE 0.068
Use #0A2147 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.