#055173
Closest named color: Deep Sea Blue (#015482). oklch(41.2% 0.086 236), rgb(5, 81, 115).
Aa
White text reads best on this color (8.63:1).
About this color
#055173 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.086 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.025 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #055173 |
| RGB | rgb(5, 81, 115) |
| HSL | hsl(199, 92%, 24%) |
| OKLCH | oklch(41.2% 0.086 236) |
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 #055173 | 8.63:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #055173 | 2.43:1 | Fails | Lc 14.8 | Not readable |
| #055173 text on white | 8.63:1 | AAA | Lc 89.2 | Fine for body text |
| #055173 text on black | 2.43:1 | Fails | Lc -13.0 | 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 800.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A2C6DD
oklch(80.8% 0.05 236.3)
-
Step 400
400
#6EA9CC
oklch(70.8% 0.08 235.6)
-
Step 500
500
#4293BF
oklch(63.2% 0.103 235.4)
-
Step 600
600
#197CAC
oklch(55.6% 0.112 236.3)
-
Step 700
700
#046993
oklch(49.2% 0.103 235.2)
-
Step 800
800 (this color)
#055173
oklch(41.2% 0.086 236)
-
Step 900
900
#164760
oklch(37.8% 0.067 234.9)
-
Step 950
950
#0F2A38
oklch(27.1% 0.042 233.9)
#055173 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) | #405175 | 0.050 |
| Deuteranopia (no green cones) | #324772 | 0.041 |
| Tritanopia (no blue cones) | #005A5D | 0.054 |
| Achromatopsia (no color) | #4C4C4C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055173
#055173
oklch(41.2% 0.086 236)
- #6E3D15
#6E3D15
oklch(41.3% 0.086 55.9)
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 #055173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.025
- Light Navy #155084 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Deep Teal #00555A ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Petrol #005F6A ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.053
Use #055173 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.