#0A2040
Closest named color: Oxford Blue (#1B263B). oklch(24.6% 0.067 258.1), rgb(10, 32, 64).
Aa
White text reads best on this color (16.23:1).
About this color
#0A2040 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.067 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.034 away. White text reads best on it, at 16.23:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.23:1 |
Values
| HEX | #0A2040 |
| RGB | rgb(10, 32, 64) |
| HSL | hsl(216, 73%, 15%) |
| OKLCH | oklch(24.6% 0.067 258.1) |
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 #0A2040 | 16.23:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0A2040 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0A2040 text on white | 16.23:1 | AAA | Lc 103.0 | Preferred for body text |
| #0A2040 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A1C3F4
oklch(81% 0.079 257.5)
-
Step 400
400
#6DA2EF
oklch(70.8% 0.127 257.7)
-
Step 500
500
#4588EA
oklch(63.1% 0.163 258)
-
Step 600
600
#246FD8
oklch(55.6% 0.177 258.1)
-
Step 700
700
#175CBB
oklch(49% 0.164 258.2)
-
Step 800
800
#164C97
oklch(42.7% 0.135 258)
-
Step 900
900
#194078
oklch(37.6% 0.105 257.9)
-
Step 950
950 (this color)
#0A2040
oklch(24.6% 0.067 258.1)
#0A2040 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) | #102341 | 0.013 |
| Deuteranopia (no green cones) | #061E3F | 0.009 |
| Tritanopia (no blue cones) | #00282C | 0.054 |
| Achromatopsia (no color) | #202020 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2040
#0A2040
oklch(24.6% 0.067 258.1)
- #2E1D00
#2E1D00
oklch(24.6% 0.051 77.8)
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 #0A2040, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.034
- Dark #1B2431 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.043
- Navy Blue #001146 ΔE 0.051
- Jet #212529 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.068
- Marine #042E60 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.070
Use #0A2040 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.