#055576
Closest named color: Deep Sea Blue (#015482). oklch(42.4% 0.087 234), rgb(5, 85, 118).
Aa
White text reads best on this color (8.17:1).
About this color
#055576 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.021 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #055576 |
| RGB | rgb(5, 85, 118) |
| HSL | hsl(198, 92%, 24%) |
| OKLCH | oklch(42.4% 0.087 234) |
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 #055576 | 8.17:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #055576 | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #055576 text on white | 8.17:1 | AAA | Lc 87.8 | Fine for body text |
| #055576 text on black | 2.56:1 | Fails | Lc -14.3 | 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
#A1C7DD
oklch(80.9% 0.051 233.6)
-
Step 400
400
#6CA9CC
oklch(70.7% 0.081 234.8)
-
Step 500
500
#3F93BE
oklch(63% 0.103 234.1)
-
Step 600
600
#0F7DAB
oklch(55.6% 0.113 234.1)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800 (this color)
#055576
oklch(42.4% 0.087 234)
-
Step 900
900
#144760
oklch(37.7% 0.068 234.3)
-
Step 950
950
#0E2A38
oklch(27.1% 0.042 233.2)
#055576 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) | #455478 | 0.054 |
| Deuteranopia (no green cones) | #364B75 | 0.043 |
| Tritanopia (no blue cones) | #005E60 | 0.054 |
| Achromatopsia (no color) | #4F4F4F | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055576
#055576
oklch(42.4% 0.087 234)
- #723F1A
#723F1A
oklch(42.3% 0.087 53.6)
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 #055576, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy #155084 ΔE 0.032
- Petrol #005F6A ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusk Blue #26538D ΔE 0.046
- Deep Teal #00555A ΔE 0.049
- YInMn Blue #415A77 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.057
Use #055576 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.