#0F3970
Closest named color: Marine Blue (#01386A). oklch(35% 0.106 257), rgb(15, 57, 112).
Aa
White text reads best on this color (11.41:1).
About this color
#0F3970 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.106 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 11.41:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.83:1 |
| White text | 11.41:1 |
Values
| HEX | #0F3970 |
| RGB | rgb(15, 57, 112) |
| HSL | hsl(214, 76%, 25%) |
| OKLCH | oklch(35% 0.106 257) |
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 #0F3970 | 11.41:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #0F3970 | 1.83:1 | Fails | Lc 8.0 | Not readable |
| #0F3970 text on white | 11.41:1 | AAA | Lc 95.9 | Preferred for body text |
| #0F3970 text on black | 1.83:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F4
oklch(80.9% 0.079 256.8)
-
Step 400
400
#6CA2EF
oklch(70.7% 0.127 257.3)
-
Step 500
500
#4289E9
oklch(63.2% 0.161 256.8)
-
Step 600
600
#1F70D7
oklch(55.6% 0.175 257)
-
Step 700
700
#105DBB
oklch(49.1% 0.164 257.1)
-
Step 800
800
#124D97
oklch(42.8% 0.135 256.8)
-
Step 900
900 (this color)
#0F3970
oklch(35% 0.106 257)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#0F3970 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) | #1A3E72 | 0.019 |
| Deuteranopia (no green cones) | #00366F | 0.014 |
| Tritanopia (no blue cones) | #00464F | 0.079 |
| Achromatopsia (no color) | #3A3A3A | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F3970
#0F3970
oklch(35% 0.106 257)
- #503400
#503400
oklch(35% 0.073 75.8)
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 #0F3970, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Twilight Blue #0A437A ΔE 0.032
- Marine #042E60 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.064
- Midnight Green #073B4C ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.067
- Cobalt #1E488F ΔE 0.068
Use #0F3970 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.