#003F86
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.132 256.6), rgb(0, 63, 134).
Aa
White text reads best on this color (10.21:1).
About this color
#003F86 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.132 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 10.21:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #003F86 |
| RGB | rgb(0, 63, 134) |
| HSL | hsl(212, 100%, 26%) |
| OKLCH | oklch(37.9% 0.132 256.6) |
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 #003F86 | 10.21:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #003F86 | 2.05:1 | Fails | Lc 10.9 | Not readable |
| #003F86 text on white | 10.21:1 | AAA | Lc 93.0 | Preferred for body text |
| #003F86 text on black | 2.05:1 | Fails | Lc -9.5 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DBFE
oklch(88.4% 0.055 256.8)
-
Step 300
300
#98C3FF
oklch(80.9% 0.097 256.8)
-
Step 400
400
#5CA1FF
oklch(70.6% 0.155 256.6)
-
Step 500
500
#2286FF
oklch(63.1% 0.2 256.5)
-
Step 600
600
#006EE1
oklch(55.5% 0.194 256.7)
-
Step 700
700
#005DBF
oklch(49.2% 0.171 256.5)
-
Step 800
800
#004B9E
oklch(42.6% 0.15 256.7)
-
Step 900
900 (this color)
#003F86
oklch(37.9% 0.132 256.6)
-
Step 950
950
#05254E
oklch(26.9% 0.084 256.6)
#003F86 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) | #0B4789 | 0.025 |
| Deuteranopia (no green cones) | #003C85 | 0.009 |
| Tritanopia (no blue cones) | #00515C | 0.100 |
| Achromatopsia (no color) | #414141 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003F86
#003F86
oklch(37.9% 0.132 256.6)
- #5A3B00
#5A3B00
oklch(37.9% 0.08 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 #003F86, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Cobalt #1E488F ΔE 0.037
- Marine Blue #01386A ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.064
- Sapphire #2138AB ΔE 0.067
- Dusk Blue #26538D ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.075
Use #003F86 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.