#0F3B89
Closest named color: Twilight Blue (#0A437A). oklch(37.5% 0.139 261), rgb(15, 59, 137).
Aa
White text reads best on this color (10.46:1).
About this color
#0F3B89 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.139 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.036 away. White text reads best on it, at 10.46:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #0F3B89 |
| RGB | rgb(15, 59, 137) |
| HSL | hsl(218, 80%, 30%) |
| OKLCH | oklch(37.5% 0.139 261) |
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 #0F3B89 | 10.46:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #0F3B89 | 2.00:1 | Fails | Lc 10.3 | Not readable |
| #0F3B89 text on white | 10.46:1 | AAA | Lc 93.7 | Preferred for body text |
| #0F3B89 text on black | 2.00:1 | Fails | Lc -8.8 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500
#3D82FF
oklch(63% 0.199 261.1)
-
Step 600
600
#0C65F7
oklch(55.6% 0.231 261)
-
Step 700
700
#0053D6
oklch(49.1% 0.213 261)
-
Step 800
800
#0545AE
oklch(42.8% 0.178 260.9)
-
Step 900
900 (this color)
#0F3B89
oklch(37.5% 0.139 261)
-
Step 950
950
#0B2450
oklch(27% 0.087 260.8)
#0F3B89 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) | #00458C | 0.027 |
| Deuteranopia (no green cones) | #003A87 | 0.009 |
| Tritanopia (no blue cones) | #004F5C | 0.107 |
| Achromatopsia (no color) | #3F3F3F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F3B89
#0F3B89
oklch(37.5% 0.139 261)
- #563C00
#563C00
oklch(37.6% 0.078 81.1)
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 #0F3B89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.036
- Cobalt #1E488F ΔE 0.041
- Marine Blue #01386A ΔE 0.055
- Sapphire #2138AB ΔE 0.059
- Light Navy #155084 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Dusk Blue #26538D ΔE 0.074
Use #0F3B89 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.