#0C5571
Closest named color: Deep Sea Blue (#015482). oklch(42.2% 0.08 230.5), rgb(12, 85, 113).
Aa
White text reads best on this color (8.22:1).
About this color
#0C5571 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.030 away. White text reads best on it, at 8.22:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #0C5571 |
| RGB | rgb(12, 85, 113) |
| HSL | hsl(197, 81%, 25%) |
| OKLCH | oklch(42.2% 0.08 230.5) |
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 #0C5571 | 8.22:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #0C5571 | 2.55:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #0C5571 text on white | 8.22:1 | AAA | Lc 88.0 | Fine for body text |
| #0C5571 text on black | 2.55:1 | Fails | Lc -14.1 | 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
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A3C7DA
oklch(81% 0.047 231.1)
-
Step 400
400
#6EAAC7
oklch(70.8% 0.075 230.1)
-
Step 500
500
#4394B8
oklch(63.1% 0.095 230)
-
Step 600
600
#1A7EA5
oklch(55.7% 0.104 230.5)
-
Step 700
700
#066A8D
oklch(49.2% 0.097 230.3)
-
Step 800
800 (this color)
#0C5571
oklch(42.2% 0.08 230.5)
-
Step 900
900
#17475C
oklch(37.6% 0.062 230.6)
-
Step 950
950
#0F2A36
oklch(27% 0.04 229.8)
#0C5571 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) | #475472 | 0.055 |
| Deuteranopia (no green cones) | #3A4B71 | 0.046 |
| Tritanopia (no blue cones) | #005D5E | 0.047 |
| Achromatopsia (no color) | #4F4F4F | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C5571
#0C5571
oklch(42.2% 0.08 230.5)
- #704022
#704022
oklch(42.3% 0.08 51.1)
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 #0C5571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.030
- Petrol #005F6A ΔE 0.037
- Light Navy #155084 ΔE 0.039
- Deep Teal #00555A ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
Use #0C5571 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.