#056366
Closest named color: Petrol (#005F6A). oklch(45.4% 0.076 198.5), rgb(5, 99, 102).
Aa
White text reads best on this color (7.03:1).
About this color
#056366 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 45%, its chroma 0.076 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.017 away. White text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #056366 |
| RGB | rgb(5, 99, 102) |
| HSL | hsl(182, 91%, 21%) |
| OKLCH | oklch(45.4% 0.076 198.5) |
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 #056366 | 7.03:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #056366 | 2.98:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #056366 text on white | 7.03:1 | AAA | Lc 83.9 | Fine for body text |
| #056366 text on black | 2.98:1 | Fails | Lc -18.0 | 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
#E1EDED
oklch(93.7% 0.013 196.9)
-
Step 200
200
#C7DEDF
oklch(88.4% 0.025 199.9)
-
Step 300
300
#A0CACB
oklch(80.9% 0.044 198.1)
-
Step 400
400
#68AEB1
oklch(70.6% 0.071 199.2)
-
Step 500
500
#369A9E
oklch(63.1% 0.091 198.9)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800 (this color)
#056366
oklch(45.4% 0.076 198.5)
-
Step 900
900
#0D4B4D
oklch(37.7% 0.059 198.3)
-
Step 950
950
#0B2C2D
oklch(27% 0.038 198)
#056366 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) | #5B5E66 | 0.078 |
| Deuteranopia (no green cones) | #4F5566 | 0.072 |
| Tritanopia (no blue cones) | #006764 | 0.014 |
| Achromatopsia (no color) | #595959 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #056366
#056366
oklch(45.4% 0.076 198.5)
- #7B4446
#7B4446
oklch(45.4% 0.076 18.2)
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 #056366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.017
- Dark Aqua #05696B ΔE 0.019
- Dark Green Blue #1F6357 ΔE 0.025
- Deep Teal #00555A ΔE 0.046
- Dark Aquamarine #017371 ΔE 0.050
- Deep Turquoise #017374 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.063
- Dark Slate Gray #2F4F4F ΔE 0.064
Use #056366 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.