#0F588B
Closest named color: Deep Sea Blue (#015482). oklch(44.6% 0.107 245.8), rgb(15, 88, 139).
Aa
White text reads best on this color (7.52:1).
About this color
#0F588B is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.019 away. White text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.78:1 |
| White text | 7.52:1 |
Values
| HEX | #0F588B |
| RGB | rgb(15, 88, 139) |
| HSL | hsl(205, 81%, 30%) |
| OKLCH | oklch(44.6% 0.107 245.8) |
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 #0F588B | 7.52:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #0F588B | 2.78:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #0F588B text on white | 7.52:1 | AAA | Lc 85.7 | Fine for body text |
| #0F588B text on black | 2.78:1 | Fails | Lc -16.3 | Dividers and decoration only |
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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#6AA7DB
oklch(70.8% 0.099 245.5)
-
Step 500
500
#3C90D1
oklch(63.2% 0.127 245.3)
-
Step 600
600
#0C78BF
oklch(55.5% 0.14 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800 (this color)
#0F588B
oklch(44.6% 0.107 245.8)
-
Step 900
900
#13456B
oklch(37.8% 0.083 245.9)
-
Step 950
950
#0D283E
oklch(26.8% 0.053 246.1)
#0F588B 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) | #405A8D | 0.042 |
| Deuteranopia (no green cones) | #2E508A | 0.029 |
| Tritanopia (no blue cones) | #00646B | 0.073 |
| Achromatopsia (no color) | #545454 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F588B
#0F588B
oklch(44.6% 0.107 245.8)
- #784700
#784700
oklch(44.6% 0.099 66.4)
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 #0F588B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.019
- Dusk Blue #26538D ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.023
- Light Navy #155084 ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.039
- Peacock Blue #016795 ΔE 0.045
- Cobalt #1E488F ΔE 0.048
- Denim #3B638C ΔE 0.051
Use #0F588B 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.