#005C66
Closest named color: Petrol (#005F6A). oklch(43.4% 0.075 207.6), rgb(0, 92, 102).
Aa
White text reads best on this color (7.71:1).
About this color
#005C66 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.075 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.010 away. White text reads best on it, at 7.71:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.72:1 |
| White text | 7.71:1 |
Values
| HEX | #005C66 |
| RGB | rgb(0, 92, 102) |
| HSL | hsl(186, 100%, 20%) |
| OKLCH | oklch(43.4% 0.075 207.6) |
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 #005C66 | 7.71:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #005C66 | 2.72:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #005C66 text on white | 7.71:1 | AAA | Lc 86.3 | Fine for body text |
| #005C66 text on black | 2.72:1 | Fails | Lc -15.8 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A1C9CF
oklch(80.9% 0.043 207.6)
-
Step 400
400
#6AADB7
oklch(70.7% 0.07 207.8)
-
Step 500
500
#3A98A5
oklch(63% 0.089 207.9)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800 (this color)
#005C66
oklch(43.4% 0.075 207.6)
-
Step 900
900
#104A51
oklch(37.7% 0.058 207)
-
Step 950
950
#0C2B30
oklch(26.9% 0.037 209.8)
#005C66 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) | #525867 | 0.071 |
| Deuteranopia (no green cones) | #464F66 | 0.065 |
| Tritanopia (no blue cones) | #00615F | 0.023 |
| Achromatopsia (no color) | #535353 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #005C66
#005C66
oklch(43.4% 0.075 207.6)
- #75403A
#75403A
oklch(43.5% 0.075 27.4)
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 #005C66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.010
- Deep Teal #00555A ΔE 0.027
- Dark Green Blue #1F6357 ΔE 0.041
- Dark Aqua #05696B ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.049
- Dark Blue Green #005249 ΔE 0.052
- Dark Teal #014D4E ΔE 0.056
- YInMn Blue #415A77 ΔE 0.059
Use #005C66 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.