#0A2043
Closest named color: Oxford Blue (#1B263B). oklch(24.9% 0.072 259.4), rgb(10, 32, 67).
Aa
White text reads best on this color (16.14:1).
About this color
#0A2043 is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.072 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 16.14:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.14:1 |
Values
| HEX | #0A2043 |
| RGB | rgb(10, 32, 67) |
| HSL | hsl(217, 74%, 15%) |
| OKLCH | oklch(24.9% 0.072 259.4) |
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 #0A2043 | 16.14:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0A2043 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #0A2043 text on white | 16.14:1 | AAA | Lc 102.9 | Preferred for body text |
| #0A2043 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A0C2F8
oklch(80.9% 0.085 259.5)
-
Step 400
400
#6CA1F5
oklch(70.8% 0.136 259.3)
-
Step 500
500
#4386F1
oklch(63.1% 0.175 259.4)
-
Step 600
600
#236DDF
oklch(55.6% 0.189 259.4)
-
Step 700
700
#155AC2
oklch(49.1% 0.176 259.5)
-
Step 800
800
#154A9D
oklch(42.7% 0.146 259.6)
-
Step 900
900
#183F7D
oklch(37.7% 0.114 259.5)
-
Step 950
950 (this color)
#0A2043
oklch(24.9% 0.072 259.4)
#0A2043 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) | #0D2444 | 0.014 |
| Deuteranopia (no green cones) | #021E42 | 0.012 |
| Tritanopia (no blue cones) | #00282E | 0.055 |
| Achromatopsia (no color) | #212121 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2043
#0A2043
oklch(24.9% 0.072 259.4)
- #2E1E00
#2E1E00
oklch(24.9% 0.051 80.2)
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 #0A2043, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.048
- Navy Blue #001146 ΔE 0.049
- Jet #212529 ΔE 0.064
- Marine #042E60 ΔE 0.065
- Dark Indigo #1F0954 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.068
Use #0A2043 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.