#033A6C
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.101 252.2), rgb(3, 58, 108).
Aa
White text reads best on this color (11.50:1).
About this color
#033A6C is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.101 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.007 away. White text reads best on it, at 11.50:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #033A6C |
| RGB | rgb(3, 58, 108) |
| HSL | hsl(209, 95%, 22%) |
| OKLCH | oklch(34.7% 0.101 252.2) |
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 #033A6C | 11.50:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #033A6C | 1.82:1 | Fails | Lc 7.9 | Not readable |
| #033A6C text on white | 11.50:1 | AAA | Lc 96.0 | Preferred for body text |
| #033A6C 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
#9DC4F1
oklch(80.8% 0.076 252.3)
-
Step 400
400
#66A4EA
oklch(70.6% 0.122 252.5)
-
Step 500
500
#368CE4
oklch(63.2% 0.156 252.1)
-
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
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900 (this color)
#033A6C
oklch(34.7% 0.101 252.2)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#033A6C 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) | #1F3E6E | 0.025 |
| Deuteranopia (no green cones) | #08356B | 0.015 |
| Tritanopia (no blue cones) | #00464D | 0.075 |
| Achromatopsia (no color) | #393939 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033A6C
#033A6C
oklch(34.7% 0.101 252.2)
- #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 #033A6C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.007
- Twilight Blue #0A437A ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.039
- Marine #042E60 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.058
- Midnight Green #073B4C ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.063
- Charcoal #264653 ΔE 0.071
Use #033A6C 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.