#033A6D
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.103 252.6), rgb(3, 58, 109).
Aa
White text reads best on this color (11.47:1).
About this color
#033A6D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.103 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.008 away. White text reads best on it, at 11.47:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.47:1 |
Values
| HEX | #033A6D |
| RGB | rgb(3, 58, 109) |
| HSL | hsl(209, 95%, 22%) |
| OKLCH | oklch(34.7% 0.103 252.6) |
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 #033A6D | 11.47:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #033A6D | 1.82:1 | Fails | Lc 8.0 | Not readable |
| #033A6D text on white | 11.47:1 | AAA | Lc 95.9 | Preferred for body text |
| #033A6D text on black | 1.82:1 | Fails | Lc 0.0 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DCF5
oklch(88.6% 0.042 251.7)
-
Step 300
300
#9DC4F2
oklch(80.8% 0.078 252.9)
-
Step 400
400
#65A4EB
oklch(70.6% 0.123 252.5)
-
Step 500
500
#368BE5
oklch(63% 0.158 252.8)
-
Step 600
600
#0073D2
oklch(55.5% 0.17 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900 (this color)
#033A6D
oklch(34.7% 0.103 252.6)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#033A6D 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) | #1F3E6F | 0.025 |
| Deuteranopia (no green cones) | #06356C | 0.015 |
| Tritanopia (no blue cones) | #00464E | 0.075 |
| Achromatopsia (no color) | #393939 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033A6D
#033A6D
oklch(34.7% 0.103 252.6)
- #513200
#513200
oklch(34.6% 0.074 71.8)
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 #033A6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.008
- Twilight Blue #0A437A ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.041
- Marine #042E60 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.059
- Midnight Green #073B4C ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.064
- Charcoal #264653 ΔE 0.072
Use #033A6D 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.