#01566D
Closest named color: Petrol (#005F6A). oklch(42.1% 0.079 224), rgb(1, 86, 109).
Aa
White text reads best on this color (8.22:1).
About this color
#01566D is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.079 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.031 away. White text reads best on it, at 8.22:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #01566D |
| RGB | rgb(1, 86, 109) |
| HSL | hsl(193, 98%, 22%) |
| OKLCH | oklch(42.1% 0.079 224) |
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 #01566D | 8.22:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #01566D | 2.55:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #01566D text on white | 8.22:1 | AAA | Lc 87.9 | Fine for body text |
| #01566D text on black | 2.55:1 | Fails | Lc -14.2 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A1C8D7
oklch(81% 0.046 223.3)
-
Step 400
400
#6CABC3
oklch(70.8% 0.074 224.2)
-
Step 500
500
#3E96B4
oklch(63.2% 0.094 223.9)
-
Step 600
600
#0B7F9F
oklch(55.5% 0.102 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800 (this color)
#01566D
oklch(42.1% 0.079 224)
-
Step 900
900
#13485A
oklch(37.6% 0.062 225)
-
Step 950
950
#0E2A34
oklch(26.9% 0.038 224.5)
#01566D 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) | #49546E | 0.061 |
| Deuteranopia (no green cones) | #3C4B6D | 0.053 |
| Tritanopia (no blue cones) | #005D5E | 0.039 |
| Achromatopsia (no color) | #4F4F4F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01566D
#01566D
oklch(42.1% 0.079 224)
- #713E28
#713E28
oklch(42.2% 0.079 43.5)
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 #01566D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.031
- Deep Teal #00555A ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.038
- Light Navy #155084 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
- Dark Teal #014D4E ΔE 0.054
- YInMn Blue #415A77 ΔE 0.056
Use #01566D 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.