#0A556E
Closest named color: Petrol (#005F6A). oklch(42% 0.078 227.3), rgb(10, 85, 110).
Aa
White text reads best on this color (8.27:1).
About this color
#0A556E is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.078 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.035 away. White text reads best on it, at 8.27:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #0A556E |
| RGB | rgb(10, 85, 110) |
| HSL | hsl(195, 83%, 24%) |
| OKLCH | oklch(42% 0.078 227.3) |
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 #0A556E | 8.27:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #0A556E | 2.53:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #0A556E text on white | 8.27:1 | AAA | Lc 88.2 | Fine for body text |
| #0A556E text on black | 2.53:1 | Fails | Lc -14.0 | 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
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D8
oklch(80.9% 0.045 228.2)
-
Step 400
400
#6EAAC4
oklch(70.7% 0.073 227.3)
-
Step 500
500
#4395B5
oklch(63.2% 0.092 226.7)
-
Step 600
600
#197EA1
oklch(55.5% 0.101 227.5)
-
Step 700
700
#056A8A
oklch(49% 0.094 227.9)
-
Step 800
800 (this color)
#0A556E
oklch(42% 0.078 227.3)
-
Step 900
900
#17485B
oklch(37.8% 0.061 227.6)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#0A556E 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) | #48536F | 0.057 |
| Deuteranopia (no green cones) | #3B4A6E | 0.050 |
| Tritanopia (no blue cones) | #005C5D | 0.042 |
| Achromatopsia (no color) | #4E4E4E | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A556E
#0A556E
oklch(42% 0.078 227.3)
- #6F3F25
#6F3F25
oklch(42% 0.078 48.1)
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 #0A556E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.035
- Deep Teal #00555A ΔE 0.035
- Light Navy #155084 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.054
Use #0A556E 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.