#033D70
Closest named color: Marine Blue (#01386A). oklch(35.7% 0.103 251.7), rgb(3, 61, 112).
Aa
White text reads best on this color (11.02:1).
About this color
#033D70 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.103 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.018 away. White text reads best on it, at 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #033D70 |
| RGB | rgb(3, 61, 112) |
| HSL | hsl(208, 95%, 23%) |
| OKLCH | oklch(35.7% 0.103 251.7) |
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 #033D70 | 11.02:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #033D70 | 1.90:1 | Fails | Lc 9.0 | Not readable |
| #033D70 text on white | 11.02:1 | AAA | Lc 95.0 | Preferred for body text |
| #033D70 text on black | 1.90:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9CC5F2
oklch(81% 0.078 251.1)
-
Step 400
400
#63A5EB
oklch(70.7% 0.123 251.2)
-
Step 500
500
#328CE5
oklch(63.1% 0.158 251.7)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900 (this color)
#033D70
oklch(35.7% 0.103 251.7)
-
Step 950
950
#0A2745
oklch(26.9% 0.066 252.2)
#033D70 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) | #224172 | 0.027 |
| Deuteranopia (no green cones) | #0C386F | 0.015 |
| Tritanopia (no blue cones) | #004951 | 0.074 |
| Achromatopsia (no color) | #3C3C3C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033D70
#033D70
oklch(35.7% 0.103 251.7)
- #553400
#553400
oklch(35.7% 0.077 70.8)
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 #033D70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.018
- Twilight Blue #0A437A ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.047
- Marine #042E60 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.063
- Cobalt #1E488F ΔE 0.064
Use #033D70 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.