#04566C
Closest named color: Petrol (#005F6A). oklch(42.1% 0.077 223.2), rgb(4, 86, 108).
Aa
White text reads best on this color (8.22:1).
About this color
#04566C is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.077 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.030 away. White text reads best on it, at 8.22:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #04566C |
| RGB | rgb(4, 86, 108) |
| HSL | hsl(193, 93%, 22%) |
| OKLCH | oklch(42.1% 0.077 223.2) |
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 #04566C | 8.22:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #04566C | 2.55:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #04566C text on white | 8.22:1 | AAA | Lc 88.0 | Fine for body text |
| #04566C 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
#C8DDE5
oklch(88.4% 0.025 222.6)
-
Step 300
300
#A2C8D6
oklch(81% 0.045 222.3)
-
Step 400
400
#6DABC2
oklch(70.8% 0.072 223.6)
-
Step 500
500
#3F96B2
oklch(63.2% 0.092 222.4)
-
Step 600
600
#107F9E
oklch(55.5% 0.1 223.6)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800 (this color)
#04566C
oklch(42.1% 0.077 223.2)
-
Step 900
900
#144859
oklch(37.6% 0.06 223.9)
-
Step 950
950
#0E2A34
oklch(26.9% 0.038 224.5)
#04566C 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) | #49546D | 0.060 |
| Deuteranopia (no green cones) | #3D4B6C | 0.053 |
| Tritanopia (no blue cones) | #005D5D | 0.039 |
| Achromatopsia (no color) | #4F4F4F | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04566C
#04566C
oklch(42.1% 0.077 223.2)
- #703E29
#703E29
oklch(42.1% 0.077 43.1)
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 #04566C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.030
- Deep Teal #00555A ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.040
- Light Navy #155084 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.052
- Dark Teal #014D4E ΔE 0.053
- YInMn Blue #415A77 ΔE 0.055
Use #04566C 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.