#003C74
Closest named color: Marine Blue (#01386A). oklch(35.7% 0.111 253.2), rgb(0, 60, 116).
Aa
White text reads best on this color (11.06:1).
About this color
#003C74 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.111 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.020 away. White text reads best on it, at 11.06:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #003C74 |
| RGB | rgb(0, 60, 116) |
| HSL | hsl(209, 100%, 23%) |
| OKLCH | oklch(35.7% 0.111 253.2) |
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 #003C74 | 11.06:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #003C74 | 1.89:1 | Fails | Lc 8.9 | Not readable |
| #003C74 text on white | 11.06:1 | AAA | Lc 95.0 | Preferred for body text |
| #003C74 text on black | 1.89:1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#9BC4F6
oklch(80.9% 0.084 253.7)
-
Step 400
400
#61A4F1
oklch(70.7% 0.133 253.1)
-
Step 500
500
#2D8AEC
oklch(63% 0.17 253.3)
-
Step 600
600
#0073D4
oklch(55.6% 0.172 253.1)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004F95
oklch(42.8% 0.133 253.1)
-
Step 900
900 (this color)
#003C74
oklch(35.7% 0.111 253.2)
-
Step 950
950
#082747
oklch(27% 0.069 252.5)
#003C74 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) | #1C4176 | 0.025 |
| Deuteranopia (no green cones) | #003773 | 0.015 |
| Tritanopia (no blue cones) | #004A52 | 0.083 |
| Achromatopsia (no color) | #3C3C3C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003C74
#003C74
oklch(35.7% 0.111 253.2)
- #543500
#543500
oklch(35.7% 0.076 73.2)
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 #003C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.020
- Twilight Blue #0A437A ΔE 0.024
- Marine #042E60 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Cobalt #1E488F ΔE 0.061
- Light Navy #155084 ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.069
Use #003C74 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.