#0F3D7D
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.119 258.1), rgb(15, 61, 125).
Aa
White text reads best on this color (10.58:1).
About this color
#0F3D7D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.119 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.019 away. White text reads best on it, at 10.58:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #0F3D7D |
| RGB | rgb(15, 61, 125) |
| HSL | hsl(215, 79%, 27%) |
| OKLCH | oklch(37% 0.119 258.1) |
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 #0F3D7D | 10.58:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #0F3D7D | 1.98:1 | Fails | Lc 9.9 | Not readable |
| #0F3D7D text on white | 10.58:1 | AAA | Lc 94.1 | Preferred for body text |
| #0F3D7D text on black | 1.98:1 | Fails | Lc -8.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9DC3FB
oklch(81% 0.09 258)
-
Step 400
400
#66A1F8
oklch(70.7% 0.142 258)
-
Step 500
500
#3986F5
oklch(63% 0.183 258.1)
-
Step 600
600
#0E6DE4
oklch(55.6% 0.198 258)
-
Step 700
700
#005AC5
oklch(49.1% 0.183 258.1)
-
Step 800
800
#064AA0
oklch(42.6% 0.153 258.1)
-
Step 900
900 (this color)
#0F3D7D
oklch(37% 0.119 258.1)
-
Step 950
950
#0C254A
oklch(26.8% 0.075 258.4)
#0F3D7D 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) | #16447F | 0.022 |
| Deuteranopia (no green cones) | #003A7C | 0.013 |
| Tritanopia (no blue cones) | #004D57 | 0.091 |
| Achromatopsia (no color) | #3F3F3F | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F3D7D
#0F3D7D
oklch(37% 0.119 258.1)
- #563A00
#563A00
oklch(37.1% 0.077 78.3)
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 #0F3D7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.019
- Marine Blue #01386A ΔE 0.037
- Cobalt #1E488F ΔE 0.045
- Light Navy #155084 ΔE 0.057
- Marine #042E60 ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
- Deep Sea Blue #015482 ΔE 0.067
- Dusk Blue #26538D ΔE 0.073
Use #0F3D7D 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.