#0A2238
Closest named color: Dark (#1B2431). oklch(24.6% 0.052 249), rgb(10, 34, 56).
Aa
White text reads best on this color (16.16:1).
About this color
#0A2238 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.052 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.027 away. White text reads best on it, at 16.16:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.16:1 |
Values
| HEX | #0A2238 |
| RGB | rgb(10, 34, 56) |
| HSL | hsl(209, 70%, 13%) |
| OKLCH | oklch(24.6% 0.052 249) |
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 #0A2238 | 16.16:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0A2238 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0A2238 text on white | 16.16:1 | AAA | Lc 103.0 | Preferred for body text |
| #0A2238 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEF
oklch(88.6% 0.033 248.2)
-
Step 300
300
#A3C5E7
oklch(81% 0.061 248.6)
-
Step 400
400
#6FA6DB
oklch(70.8% 0.097 248.5)
-
Step 500
500
#468ED1
oklch(63.1% 0.125 249)
-
Step 600
600
#2377BE
oklch(55.6% 0.135 248.9)
-
Step 700
700
#1364A4
oklch(49.2% 0.125 248.6)
-
Step 800
800
#155285
oklch(42.8% 0.104 248.7)
-
Step 900
900
#19446B
oklch(37.7% 0.082 249.1)
-
Step 950
950 (this color)
#0A2238
oklch(24.6% 0.052 249)
#0A2238 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) | #182339 | 0.018 |
| Deuteranopia (no green cones) | #121F38 | 0.013 |
| Tritanopia (no blue cones) | #00272A | 0.038 |
| Achromatopsia (no color) | #212121 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2238
#0A2238
oklch(24.6% 0.052 249)
- #301B01
#301B01
oklch(24.5% 0.052 69)
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 #0A2238, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.027
- Oxford Blue #1B263B ΔE 0.027
- Rich Black #0D1B2A ΔE 0.032
- Jet #212529 ΔE 0.045
- Navy Blue #001146 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.073
- Marine #042E60 ΔE 0.078
Use #0A2238 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.