#003D72
Closest named color: Marine Blue (#01386A). oklch(35.8% 0.107 251.9), rgb(0, 61, 114).
Aa
White text reads best on this color (10.99:1).
About this color
#003D72 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.107 and its hue 252°. 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 (0.107) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.91:1 |
| White text | 10.99:1 |
Values
| HEX | #003D72 |
| RGB | rgb(0, 61, 114) |
| HSL | hsl(208, 100%, 22%) |
| OKLCH | oklch(35.8% 0.107 251.9) |
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 #003D72 | 10.99:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #003D72 | 1.91:1 | Fails | Lc 9.1 | Not readable |
| #003D72 text on white | 10.99:1 | AAA | Lc 94.8 | Preferred for body text |
| #003D72 text on black | 1.91:1 | Fails | Lc -7.8 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9BC5F3
oklch(81% 0.079 251.1)
-
Step 400
400
#61A5EE
oklch(70.8% 0.128 251.6)
-
Step 500
500
#2D8CE8
oklch(63.2% 0.163 251.7)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900 (this color)
#003D72
oklch(35.8% 0.107 251.9)
-
Step 950
950
#082746
oklch(26.9% 0.068 251.9)
#003D72 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) | #204174 | 0.027 |
| Deuteranopia (no green cones) | #063871 | 0.015 |
| Tritanopia (no blue cones) | #004A52 | 0.078 |
| Achromatopsia (no color) | #3C3C3C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003D72
#003D72
oklch(35.8% 0.107 251.9)
- #553500
#553500
oklch(35.9% 0.077 72.3)
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 #003D72, 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 0.023
- Prussian Blue #1D3557 ΔE 0.050
- Marine #042E60 ΔE 0.052
- Cobalt #1E488F ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.063
- Light Navy #155084 ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.065
Use #003D72 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.