#003E6D
Closest named color: Marine Blue (#01386A). oklch(35.7% 0.099 249.1), rgb(0, 62, 109).
Aa
White text reads best on this color (10.99:1).
About this color
#003E6D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.099 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.019 away. White text reads best on it, at 10.99:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #003E6D |
| RGB | rgb(0, 62, 109) |
| HSL | hsl(206, 100%, 21%) |
| OKLCH | oklch(35.7% 0.099 249.1) |
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 #003E6D | 10.99:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #003E6D | 1.90:1 | Fails | Lc 9.0 | Not readable |
| #003E6D text on white | 10.99:1 | AAA | Lc 94.9 | Preferred for body text |
| #003E6D text on black | 1.90:1 | Fails | Lc -7.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5EF
oklch(80.9% 0.074 249.4)
-
Step 400
400
#62A6E7
oklch(70.7% 0.118 248.8)
-
Step 500
500
#2E8EE0
oklch(63.2% 0.151 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900 (this color)
#003E6D
oklch(35.7% 0.099 249.1)
-
Step 950
950
#092843
oklch(27% 0.062 248.7)
#003E6D 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) | #26416F | 0.031 |
| Deuteranopia (no green cones) | #13386C | 0.019 |
| Tritanopia (no blue cones) | #004950 | 0.069 |
| Achromatopsia (no color) | #3C3C3C | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003E6D
#003E6D
oklch(35.7% 0.099 249.1)
- #563300
#563300
oklch(35.6% 0.078 68.5)
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 #003E6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.019
- Twilight Blue #0A437A ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.044
- Marine #042E60 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.057
- Midnight Green #073B4C ΔE 0.057
- Charcoal #264653 ΔE 0.063
Use #003E6D 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.