#055B4B
Closest named color: Dark Blue Green (#005249). oklch(42.2% 0.078 175), rgb(5, 91, 75).
Aa
White text reads best on this color (8.06:1).
About this color
#055B4B is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.078 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.030 away. White text reads best on it, at 8.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #055B4B |
| RGB | rgb(5, 91, 75) |
| HSL | hsl(169, 90%, 19%) |
| OKLCH | oklch(42.2% 0.078 175) |
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 #055B4B | 8.06:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #055B4B | 2.60:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #055B4B text on white | 8.06:1 | AAA | Lc 87.5 | Fine for body text |
| #055B4B text on black | 2.60:1 | Fails | Lc -14.7 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C9DFD8
oklch(88.5% 0.025 174.7)
-
Step 300
300
#A3CBBF
oklch(81% 0.046 174.9)
-
Step 400
400
#6EB09E
oklch(70.8% 0.073 174.9)
-
Step 500
500
#419C86
oklch(63.2% 0.093 174.7)
-
Step 600
600
#128670
oklch(55.6% 0.101 175.2)
-
Step 700
700
#00715E
oklch(49% 0.092 175.6)
-
Step 800
800 (this color)
#055B4B
oklch(42.2% 0.078 175)
-
Step 900
900
#154C40
oklch(37.7% 0.06 175.4)
-
Step 950
950
#0F2D25
oklch(27.1% 0.039 173.2)
#055B4B 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) | #57544A | 0.081 |
| Deuteranopia (no green cones) | #4D4D4C | 0.077 |
| Tritanopia (no blue cones) | #005C56 | 0.017 |
| Achromatopsia (no color) | #505050 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055B4B
#055B4B
oklch(42.2% 0.078 175)
- #6E3A50
#6E3A50
oklch(42.1% 0.078 354.2)
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 #055B4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.034
- Spruce #0A5F38 ΔE 0.036
- Deep Teal #00555A ΔE 0.037
- Pine #2B5D34 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.048
- Petrol #005F6A ΔE 0.050
- Dark Teal #014D4E ΔE 0.050
Use #055B4B 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.