#0A5190
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.122 251.8), rgb(10, 81, 144).
Aa
White text reads best on this color (8.09:1).
About this color
#0A5190 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.122 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.019 away. White text reads best on it, at 8.09:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.59:1 |
| White text | 8.09:1 |
Values
| HEX | #0A5190 |
| RGB | rgb(10, 81, 144) |
| HSL | hsl(208, 87%, 30%) |
| OKLCH | oklch(43.1% 0.122 251.8) |
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 #0A5190 | 8.09:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #0A5190 | 2.59:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #0A5190 text on white | 8.09:1 | AAA | Lc 87.5 | Fine for body text |
| #0A5190 text on black | 2.59:1 | Fails | Lc -14.6 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DCF3
oklch(88.6% 0.039 250.7)
-
Step 300
300
#9FC4EE
oklch(80.8% 0.072 251.9)
-
Step 400
400
#69A5E6
oklch(70.8% 0.115 251.5)
-
Step 500
500
#3D8CDE
oklch(63% 0.146 252)
-
Step 600
600
#1175CC
oklch(55.7% 0.158 251.6)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800 (this color)
#0A5190
oklch(43.1% 0.122 251.8)
-
Step 900
900
#134372
oklch(37.7% 0.095 251.6)
-
Step 950
950
#0D2743
oklch(26.9% 0.061 252.5)
#0A5190 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) | #305692 | 0.032 |
| Deuteranopia (no green cones) | #174A8F | 0.020 |
| Tritanopia (no blue cones) | #006069 | 0.089 |
| Achromatopsia (no color) | #505050 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A5190
#0A5190
oklch(43.1% 0.122 251.8)
- #6F4600
#6F4600
oklch(43.1% 0.093 71.6)
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 #0A5190, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.019
- Light Navy #155084 ΔE 0.020
- Cobalt #1E488F ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.052
- Peacock Blue #016795 ΔE 0.065
Use #0A5190 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.