#005B55
Closest named color: Deep Teal (#00555A). oklch(42.4% 0.074 187), rgb(0, 91, 85).
Aa
White text reads best on this color (7.99:1).
About this color
#005B55 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.074 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.024 away. White text reads best on it, at 7.99:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #005B55 |
| RGB | rgb(0, 91, 85) |
| HSL | hsl(176, 100%, 18%) |
| OKLCH | oklch(42.4% 0.074 187) |
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 #005B55 | 7.99:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #005B55 | 2.62:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #005B55 text on white | 7.99:1 | AAA | Lc 87.2 | Fine for body text |
| #005B55 text on black | 2.62:1 | Fails | Lc -14.9 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C8DFDC
oklch(88.6% 0.025 187.3)
-
Step 300
300
#A2CAC5
oklch(80.9% 0.043 187)
-
Step 400
400
#6CAFA8
oklch(70.7% 0.069 187.3)
-
Step 500
500
#3D9B92
oklch(63.1% 0.089 186.5)
-
Step 600
600
#05857D
oklch(55.6% 0.096 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800 (this color)
#005B55
oklch(42.4% 0.074 187)
-
Step 900
900
#124B47
oklch(37.6% 0.057 188.2)
-
Step 950
950
#0E2C29
oklch(26.9% 0.036 186.4)
#005B55 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) | #555555 | 0.078 |
| Deuteranopia (no green cones) | #4A4D56 | 0.074 |
| Tritanopia (no blue cones) | #005E59 | 0.010 |
| Achromatopsia (no color) | #515151 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #005B55
#005B55
oklch(42.4% 0.074 187)
- #703C47
#703C47
oklch(42.4% 0.074 7.2)
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 #005B55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.024
- Dark Blue Green #005249 ΔE 0.031
- Dark Green Blue #1F6357 ΔE 0.031
- Petrol #005F6A ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.043
- Dark Teal #014D4E ΔE 0.046
- Dark Aqua #05696B ΔE 0.051
- Spruce #0A5F38 ΔE 0.052
Use #005B55 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.