#0F355C
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.081 252.3), rgb(15, 53, 92).
Aa
White text reads best on this color (12.46:1).
About this color
#0F355C is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.081 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.46:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.46:1 |
Values
| HEX | #0F355C |
| RGB | rgb(15, 53, 92) |
| HSL | hsl(210, 72%, 21%) |
| OKLCH | oklch(32.5% 0.081 252.3) |
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 #0F355C | 12.46:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #0F355C | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #0F355C text on white | 12.46:1 | AAA | Lc 98.0 | Preferred for body text |
| #0F355C text on black | 1.68:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E8
oklch(81% 0.061 252.4)
-
Step 400
400
#73A4DC
oklch(70.6% 0.098 252.5)
-
Step 500
500
#4D8DD2
oklch(63.2% 0.124 251.9)
-
Step 600
600
#2E75C0
oklch(55.6% 0.136 252.6)
-
Step 700
700
#2062A5
oklch(49% 0.126 252.3)
-
Step 800
800
#1D5086
oklch(42.6% 0.105 252.7)
-
Step 900
900 (this color)
#0F355C
oklch(32.5% 0.081 252.3)
-
Step 950
950
#12283F
oklch(27.1% 0.051 251.2)
#0F355C 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) | #22385E | 0.023 |
| Deuteranopia (no green cones) | #16315B | 0.013 |
| Tritanopia (no blue cones) | #003E44 | 0.060 |
| Achromatopsia (no color) | #343434 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F355C
#0F355C
oklch(32.5% 0.081 252.3)
- #492D00
#492D00
oklch(32.4% 0.069 72.5)
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 #0F355C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Marine Blue #01386A ΔE 0.025
- Marine #042E60 ΔE 0.026
- Midnight Green #073B4C ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.040
- Gunmetal #293241 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.062
Use #0F355C 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.