#0F5573
Closest named color: Deep Sea Blue (#015482). oklch(42.4% 0.081 232.8), rgb(15, 85, 115).
Aa
White text reads best on this color (8.17:1).
About this color
#0F5573 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.081 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.026 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #0F5573 |
| RGB | rgb(15, 85, 115) |
| HSL | hsl(198, 77%, 25%) |
| OKLCH | oklch(42.4% 0.081 232.8) |
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 #0F5573 | 8.17:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #0F5573 | 2.56:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #0F5573 text on white | 8.17:1 | AAA | Lc 87.9 | Fine for body text |
| #0F5573 text on black | 2.56:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A3C7DB
oklch(81% 0.048 232.5)
-
Step 400
400
#6FA9C8
oklch(70.6% 0.076 232.7)
-
Step 500
500
#4493BA
oklch(63% 0.097 232.7)
-
Step 600
600
#1D7DA7
oklch(55.6% 0.106 233)
-
Step 700
700
#0B698F
oklch(49.1% 0.098 233.1)
-
Step 800
800 (this color)
#0F5573
oklch(42.4% 0.081 232.8)
-
Step 900
900
#18475E
oklch(37.7% 0.064 233.4)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#0F5573 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) | #465474 | 0.052 |
| Deuteranopia (no green cones) | #394B73 | 0.044 |
| Tritanopia (no blue cones) | #005D5F | 0.049 |
| Achromatopsia (no color) | #4F4F4F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F5573
#0F5573
oklch(42.4% 0.081 232.8)
- #704020
#704020
oklch(42.3% 0.081 52.4)
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 #0F5573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.026
- Light Navy #155084 ΔE 0.036
- Petrol #005F6A ΔE 0.039
- Deep Teal #00555A ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusk Blue #26538D ΔE 0.049
- YInMn Blue #415A77 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.054
Use #0F5573 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.