#0F3B7B
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.119 258.6), rgb(15, 59, 123).
Aa
White text reads best on this color (10.87:1).
About this color
#0F3B7B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.119 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.023 away. White text reads best on it, at 10.87:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #0F3B7B |
| RGB | rgb(15, 59, 123) |
| HSL | hsl(216, 78%, 27%) |
| OKLCH | oklch(36.3% 0.119 258.6) |
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 #0F3B7B | 10.87:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #0F3B7B | 1.93:1 | Fails | Lc 9.2 | Not readable |
| #0F3B7B text on white | 10.87:1 | AAA | Lc 94.7 | Preferred for body text |
| #0F3B7B text on black | 1.93:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9EC2FA
oklch(80.8% 0.089 259.1)
-
Step 400
400
#67A1F8
oklch(70.7% 0.142 258.3)
-
Step 500
500
#3C86F5
oklch(63.1% 0.182 258.6)
-
Step 600
600
#156CE4
oklch(55.5% 0.198 258.7)
-
Step 700
700
#0459C6
oklch(49% 0.185 258.7)
-
Step 800
800
#0B4AA0
oklch(42.7% 0.152 258.6)
-
Step 900
900 (this color)
#0F3B7B
oklch(36.3% 0.119 258.6)
-
Step 950
950
#0D254A
oklch(26.9% 0.075 258.9)
#0F3B7B 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) | #12427D | 0.021 |
| Deuteranopia (no green cones) | #00387A | 0.013 |
| Tritanopia (no blue cones) | #004B55 | 0.091 |
| Achromatopsia (no color) | #3D3D3D | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F3B7B
#0F3B7B
oklch(36.3% 0.119 258.6)
- #533800
#533800
oklch(36.3% 0.075 78.5)
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 #0F3B7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.023
- Marine Blue #01386A ΔE 0.032
- Cobalt #1E488F ΔE 0.051
- Marine #042E60 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.062
- Light Navy #155084 ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.075
Use #0F3B7B 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.