#00566F
Closest named color: Petrol (#005F6A). oklch(42.2% 0.081 225.9), rgb(0, 86, 111).
Aa
White text reads best on this color (8.20:1).
About this color
#00566F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.081 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.033 away. White text reads best on it, at 8.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.56:1 |
| White text | 8.20:1 |
Values
| HEX | #00566F |
| RGB | rgb(0, 86, 111) |
| HSL | hsl(194, 100%, 22%) |
| OKLCH | oklch(42.2% 0.081 225.9) |
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 #00566F | 8.20:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #00566F | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #00566F text on white | 8.20:1 | AAA | Lc 87.8 | Fine for body text |
| #00566F 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A1C8D8
oklch(81% 0.047 224.8)
-
Step 400
400
#6BABC5
oklch(70.8% 0.076 225.8)
-
Step 500
500
#3D95B6
oklch(63.1% 0.096 226.3)
-
Step 600
600
#077FA2
oklch(55.6% 0.105 226.1)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800 (this color)
#00566F
oklch(42.2% 0.081 225.9)
-
Step 900
900
#12485B
oklch(37.6% 0.063 226.1)
-
Step 950
950
#0D2A35
oklch(26.9% 0.04 226.2)
#00566F 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) | #485470 | 0.060 |
| Deuteranopia (no green cones) | #3B4B6F | 0.052 |
| Tritanopia (no blue cones) | #005D5E | 0.042 |
| Achromatopsia (no color) | #4F4F4F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00566F
#00566F
oklch(42.2% 0.081 225.9)
- #713E25
#713E25
oklch(42.1% 0.081 45.9)
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 #00566F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.035
- Deep Teal #00555A ΔE 0.036
- Light Navy #155084 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.054
- YInMn Blue #415A77 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #00566F 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.