#0F5580
Closest named color: Deep Sea Blue (#015482). oklch(43.1% 0.096 242.4), rgb(15, 85, 128).
Aa
White text reads best on this color (7.98:1).
About this color
#0F5580 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.096 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.007 away. White text reads best on it, at 7.98:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.63:1 |
| White text | 7.98:1 |
Values
| HEX | #0F5580 |
| RGB | rgb(15, 85, 128) |
| HSL | hsl(203, 79%, 28%) |
| OKLCH | oklch(43.1% 0.096 242.4) |
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 #0F5580 | 7.98:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #0F5580 | 2.63:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #0F5580 text on white | 7.98:1 | AAA | Lc 87.2 | Fine for body text |
| #0F5580 text on black | 2.63:1 | Fails | Lc -14.9 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A2C6E2
oklch(81% 0.055 241.8)
-
Step 400
400
#6DA7D4
oklch(70.6% 0.09 242.9)
-
Step 500
500
#4191C9
oklch(63.2% 0.115 242.3)
-
Step 600
600
#187AB6
oklch(55.6% 0.125 242.6)
-
Step 700
700
#04669C
oklch(49% 0.116 242.6)
-
Step 800
800 (this color)
#0F5580
oklch(43.1% 0.096 242.4)
-
Step 900
900
#164666
oklch(37.8% 0.075 242)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#0F5580 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) | #415682 | 0.045 |
| Deuteranopia (no green cones) | #314C7F | 0.034 |
| Tritanopia (no blue cones) | #006064 | 0.066 |
| Achromatopsia (no color) | #515151 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F5580
#0F5580
oklch(43.1% 0.096 242.4)
- #744206
#744206
oklch(43% 0.095 62.5)
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 #0F5580, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.007
- Light Navy #155084 ΔE 0.018
- Dusk Blue #26538D ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Cobalt #1E488F ΔE 0.049
- YInMn Blue #415A77 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.055
Use #0F5580 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.