#003E75
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.11 252.4), rgb(0, 62, 117).
Aa
White text reads best on this color (10.79:1).
About this color
#003E75 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.110 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.018 away. White text reads best on it, at 10.79:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.94:1 |
| White text | 10.79:1 |
Values
| HEX | #003E75 |
| RGB | rgb(0, 62, 117) |
| HSL | hsl(208, 100%, 23%) |
| OKLCH | oklch(36.3% 0.11 252.4) |
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 #003E75 | 10.79:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #003E75 | 1.94:1 | Fails | Lc 9.5 | Not readable |
| #003E75 text on white | 10.79:1 | AAA | Lc 94.4 | Preferred for body text |
| #003E75 text on black | 1.94:1 | Fails | Lc -8.2 | 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
#C4DCF7
oklch(88.5% 0.045 251.4)
-
Step 300
300
#9AC4F5
oklch(80.8% 0.083 252.7)
-
Step 400
400
#60A4F0
oklch(70.6% 0.132 252.5)
-
Step 500
500
#2B8BEB
oklch(63.1% 0.168 252.5)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900 (this color)
#003E75
oklch(36.3% 0.11 252.4)
-
Step 950
950
#082747
oklch(27% 0.069 252.5)
#003E75 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) | #204377 | 0.028 |
| Deuteranopia (no green cones) | #033974 | 0.015 |
| Tritanopia (no blue cones) | #004B53 | 0.080 |
| Achromatopsia (no color) | #3D3D3D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003E75
#003E75
oklch(36.3% 0.11 252.4)
- #563600
#563600
oklch(36.2% 0.077 72.7)
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 #003E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.018
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.055
- Cobalt #1E488F ΔE 0.056
- Marine #042E60 ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.068
Use #003E75 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.