#055B69
Closest named color: Petrol (#005F6A). oklch(43.3% 0.074 213), rgb(5, 91, 105).
Aa
White text reads best on this color (7.75:1).
About this color
#055B69 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.074 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.013 away. White text reads best on it, at 7.75:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #055B69 |
| RGB | rgb(5, 91, 105) |
| HSL | hsl(188, 91%, 22%) |
| OKLCH | oklch(43.3% 0.074 213) |
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 #055B69 | 7.75:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #055B69 | 2.70:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #055B69 text on white | 7.75:1 | AAA | Lc 86.5 | Fine for body text |
| #055B69 text on black | 2.70:1 | Fails | Lc -15.6 | Dividers and decoration only |
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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C9D1
oklch(81% 0.044 211.2)
-
Step 400
400
#6BACBA
oklch(70.6% 0.069 212.9)
-
Step 500
500
#3D97A9
oklch(63% 0.088 213.1)
-
Step 600
600
#048195
oklch(55.5% 0.097 213.6)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800 (this color)
#055B69
oklch(43.3% 0.074 213)
-
Step 900
900
#124954
oklch(37.6% 0.058 214.1)
-
Step 950
950
#0D2B31
oklch(27% 0.037 212.9)
#055B69 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) | #51586A | 0.068 |
| Deuteranopia (no green cones) | #444F69 | 0.060 |
| Tritanopia (no blue cones) | #00605F | 0.027 |
| Achromatopsia (no color) | #525252 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055B69
#055B69
oklch(43.3% 0.074 213)
- #744136
#744136
oklch(43.4% 0.074 33.1)
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 #055B69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.013
- Deep Teal #00555A ΔE 0.029
- Dark Aqua #05696B ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.054
- Dark Blue Green #005249 ΔE 0.055
Use #055B69 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.